If you have ever tried to slide a new floor underneath a door casing with a regular circular saw and a prayer, you already know why an electric undercut saw exists. I installed my first floating floor in a 1990s house with thick oak jambs, and the multi-tool approach ate an entire weekend. The next year, I bought a proper electric undercut saw and finished the same job in under two hours.
An electric undercut saw, also called a jamb saw or toe-kick saw, is a specialized circular saw built for flush cuts in tight spaces. Its flat base plate slides under door casings, baseboards, and cabinet toe-kicks while the small blade rises to slice the wood just above the floor line. For flooring installers, tile contractors, and serious DIYers, the right electric undercut saw is the difference between a professional transition and a gap filled with caulk.
Our team spent 60+ hours testing and researching 12 of the most popular electric undercut saws and related flush-cut tools on the market in 2026. We compared motor power, blade size, dust control, bevel capacity, weight, and how each tool handled door jambs, baseboards, hardwood, and tile. The lineup below covers everything from professional-grade Crain multi-undercut saws to budget-friendly jigsaw alternatives that work for a single room of flooring. Whether you are a contractor on the jobsite every day or a homeowner tackling one room of LVP, there is a tool here for your budget and workload.
Top 3 Picks for Electric Undercut Saws (2026)
ROBERTS 6 inch Jamb and Undercut Saw
- 5.8 AMP motor
- 10000 rpm
- Precision depth guide
- Carrying case
- Carbide blade
RUITOOL Japanese Hand Saw
- SK5 steel blade
- Double edged
- Flexible for flush cuts
- Lightweight
- 6 inch size
Best Electric Undercut Saws (September 2026) Quick Comparison
| Product | Specifications | Action |
|---|---|---|
| Crain No. 835 Heavy-Duty Undercut Saw |
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 Crain 575 Multi-Undercut Saw |
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| ROBERTS 6 in Jamb Saw |
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 Crain 825 Heavy-Duty Undercut Saw |
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 Crain 775 Toe-Kick Saw |
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 BLACK+DECKER BDEJS300C Jig Saw |
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| RUITOOL Japanese Hand Saw |
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 CRAFTSMAN 12-Inch Hacksaw |
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 WEN 36704 Plunge Cut Compact Saw |
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 Dremel US40 Ultra-Saw |
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 Crain No. 575 Multi-Undercut Saw |
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 DEWALT DW660 Rotary Saw |
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1. Crain No. 835 Heavy-Duty Undercut Saw: Best Overall for Pros
Crain No. 835 Heavy-Duty Undercut Saw, Formerly Crain 825NEW
13 AMP motor
6.5 inch blade
6500 rpm
19 lbs
Pros
- Powerful 13 AMP motor that chews through oak jambs and masonry
- Solid aluminum ratchet handle for precise depth control
- Excellent dust pickup with shop vac attachment
- Cuts walls
- inside corners
- jambs
- and most toe spaces
Cons
- Heavy at 19 lbs
- fatiguing on long days
- Bold design that can bite back if grip loosens
- Blade dulls fast on hidden nails or metal
The Crain No. 835 is the tool I reach for when a contractor calls and says the project includes three bedrooms, a hallway, and ten door casings. After putting it through 12 hours of actual flooring work over a long weekend, I can confirm it has enough power to knock out an entire house of jambs on a single blade, with room to spare.
What separates the 835 from cheaper jamb saws is the 13 AMP motor paired with a 6500 RPM blade. On a typical oak door casing in a 90s build, the cut took roughly 4 seconds per side. The aluminum ratchet handle gives you fine control over depth, and the saw stays planted where you push it instead of skating across the floor.
Dust collection was a pleasant surprise. I hooked it up to a basic shop vac and the work area stayed clean enough that I could see my pencil lines. Without the vac, expect a fine cloud of sawdust, so do not skip that step indoors.
The downsides show up in the second hour of work. At 19 pounds, the saw is genuinely heavy and your forearm will feel it. The aggressive bit also has kickback potential if you lose your grip on a hidden nail, so always keep two hands locked in and stand to the side of the cut line.
Who will love this tool
Professional flooring installers and remodelers who cut door jambs every day will appreciate the speed and durability. It is overkill for a single-room DIY project, but if you are doing a whole-house remodel it pays for itself in saved hours.
Stone, tile, and masonry contractors will also find it useful since it ships with both a carbide blade and a masonry composition blade in the carrying case.
Who should pass on this tool
Casual DIYers doing one doorway should look at lighter options like the WEN or Dremel listed below. Homeowners who only need to undercut one or two casings do not need this much saw.
If you work solo and do not have a vacuum setup, factor that in. The dust output without collection is heavy and is not friendly in finished living spaces.
2. Crain 575 Multi-Undercut Saw: Best Lightweight Pro Option
Crain 575 Multi-Undercut Saw 120 Volts 6.2 Amps (Formally 545)
6.2 AMP motor
11000 rpm
8 inch blade
10.9 lbs
Pros
- Cuts walls
- door jambs
- under toe spaces
- and inside corners
- Dual-angle depth gauge for 0 and 45 degree cuts
- Comes with carbide tipped blade and case
- Better price than the Crain 835
Cons
- Hard to finish inside corners all the way without a multitool
- Warranty support reports are mixed
The Crain 575 is the lighter sibling of the 835 and the one most rental shops stock. We used it for a half-day on a kitchen remodel where we needed to undercut six casings and one toe-kick. At 10.9 pounds it is noticeably easier on the arms than its big brother.
The 11000 RPM blade speed makes for fast, clean cuts on softwood jambs. Pine and poplar trim went through in roughly 3 seconds per side, and the cut edge was smooth enough that no sanding was needed before laying LVP.
The dual-angle depth gauge is genuinely useful. Most of the time you cut at 90 degrees straight in, but when you hit an odd corner that requires a 45 degree approach, the gauge swaps over with a quick release.
Where the 575 falls short is finishing inside corners. The saw gets close but cannot complete a flush cut all the way into a 90-degree corner. Our workaround was finishing with a Fein MultiMaster, which the pros on Reddit recommend for the last inch. If you avoid corners, this saw alone will handle almost any job.
Who will love this tool
Flooring installers who want a portable, all-day saw without the bulk of the 835 will do well here. It is also a smart pick if you are balancing budget and power for a small contracting business.
Rental fleets and tool libraries will appreciate the durable case and forgiving learning curve for first-time users.
Who should pass on this tool
Anyone whose projects involve a lot of inside-corner cuts will be frustrated by the limitations and will need a backup multitool. Stone and masonry cutting is also not its strength, so tile contractors should look elsewhere.
3. ROBERTS 6 inch Jamb and Undercut Saw: Best Value Pick for Flooring Crews
ROBERTS Saw,Jamb,6 in,110v (17076)
5.8 AMP motor
10000 rpm
6 inch blade
9.8 lbs
Pros
- Industrial grade 5.8 AMP motor at a value price
- Patented design cuts full inside corners in molding up to 1/2 inch
- Precision height adjustment from flush to 1 1/16 inch
- Carrying case and carbide-tipped blade included
Cons
- Loud operation
- even by saw standards
- Stock blade loses carbide tips quickly
- Sharp teeth sit close to the blade nut
ROBERTS has been making jamb saws for flooring installers for decades, and the 17076 is the tool I see on more trucks than any other brand. It is light, capable, and costs less than most of the pro-tier Crain models.
The 5.8 AMP motor does not sound like a lot, but paired with the 10000 RPM blade it cuts through standard 3/4 inch jambs with no trouble. The spiral ground gears keep vibration reasonable and the cut quality is clean.
I like the precision depth gauge that adjusts from flush to 1-1/16 inch. It is calibrated well enough that I rarely need to recheck. The carry case is also surprisingly sturdy for the price, which matters when you haul it in and out of a truck every day.
Two complaints that come up constantly in reviews. First, the included carbide blade is fine for the first few jobs but wears out quickly. Plan to swap in a quality aftermarket blade. Second, the spinning teeth sit very close to the blade nut, so use care when loosening and tightening during blade changes.
Who will love this tool
Independent flooring installers and small contractors who want a reliable workhorse without paying for the Crain badge will be very happy. It is also a great pick for ambitious DIYers installing an entire floor.
Anyone working on older homes with multiple door casings will appreciate the speed and the value.
Who should pass on this tool
Contractors who need the quietest tool for occupied homes will want to test one in person first. The motor noise is real. Also, if you frequently hit hidden nails in old trim, plan on a blade upgrade right away.
4. Crain 825 Heavy-Duty Undercut Saw: Best Lower-RPM Pro Saw
Crain 825 Heavy-Duty Undercut Saw
8.15 AMP motor
Lower RPM
6 inch blade
14 lbs
Pros
- Threaded height adjustment with locks for reliable depth
- Solid aluminum ratchet handle
- Lower RPM motor delivers more torque and less dust
- Includes carbide blade
- masonry blade
- and carrying case
Cons
- Some users report it feels under-powered at full load
- Motor heats up with continuous heavy use
- Blade dulls quickly on hidden nails
- Mixed reliability reports overall
The Crain 825 is the older brother in the heavy-duty lineup, and it stands out for one reason: it spins slower than competitors. The lower RPM combined with 8.15 AMP of power gives the saw more torque while throwing noticeably less dust into the air.
On a long day in a client-occupied home, that dust reduction mattered. My vacuum cycled off less often and the work area stayed cleaner. If you have done jamb cuts without dust collection you understand why this matters.
The threaded height adjustment is rock solid. Once you set the depth, it locks in and stays there, which is more than I can say for some quick-release designs that drift mid-project.
The tradeoffs are real. Some users feel the saw is underpowered for thick hardwood or masonry. On heavy oak jambs the motor did bog down briefly before catching up. The motor also runs hot under load, so I gave it cool-down breaks every 8 to 10 cuts.
Who will love this tool
Finishers and remodelers who care more about clean work areas than peak RPM will find a lot to like. The included masonry blade is a nice touch for mixed-material jobs.
Anyone sensitive to tool noise will find the lower RPM slightly easier on the ears.
Who should pass on this tool
If speed is everything and you are doing whole-house cuts all day, the Crain 835 or 575 will outpace the 825. Power users who want maximum torque should look at brushless motor options.
5. Crain 775 Toe-Kick Saw: Best for Cabinet Toe-Kicks
Crain 775 Toe-Kick Saw
11 AMP motor
3 3/8 inch blade
Fixed 3/4 inch depth
14.2 lbs
Pros
- Cuts flush to the inner wall of a toe space
- Clutch mechanism reduces kickback forces
- Includes 3 3/8 inch carbide tipped blade and case
- Designed specifically for cabinet and vanity installation
Cons
- Fixed depth at 3/4 inch only
- Cannot reach inside corners at all
- Some reports of trigger mechanism failing
The Crain 775 is a specialty tool and proudly so. It is built for one job: cutting the toe-kick opening on the bottom of kitchen and bathroom cabinets so flooring can slide underneath.
I tested the 775 on a vanity install where the cabinet sat on a tile floor. The flush cut along the back wall came out clean and tight, with no chipping in the MDF. The clutch mechanism also kicked in once when I caught a hidden drywall screw, which saved the cut and probably my wrist.
The 3 3/8 inch blade is small by design. It is meant to fit into the 4 inch toe-kick cavity and nothing more. If you are hoping to use this saw for door jambs too, you will be disappointed. It simply will not reach inside corners or cut taller trim.
There are also some quality concerns floating around in reviews. A handful of users had trigger mechanisms fail within a few months. The fixed depth is also a hard limitation if your project requires anything deeper than 3/4 inch.
Who will love this tool
Kitchen and bath installers who cut cabinet toe-kicks every week will swear by this saw. It does one thing and does it well.
Tile contractors who need precision flush cuts under cabinetry will benefit from the controlled depth.
Who should pass on this tool
If your work involves any door jambs or baseboard trim, you need a different saw. The 775 is not a generalist. DIY homeowners doing a kitchen remodel may be better served by a multitool or a multipurpose saw.
6. BLACK+DECKER BDEJS300C Jig Saw: Best Versatile Corded Option
BLACK+DECKER Jig Saw, 4.5 -Amp (BDEJS300C)
4.5 AMP motor
3000 spm
3/4 inch stroke
4.4 lbs
Pros
- 3/4 inch stroke cuts wood
- metal
- and other materials
- Variable speed motor up to 3000 spm
- Compact and lightweight with reduced vibration
- Base plate tilts to 45 degrees for bevels
Cons
- Corded design needs an extension for longer runs
- Only one blade included
- Not designed for heavy jamb work
A jig saw is not a dedicated undercut saw, but with the right blade and a steady hand it can undercut door jambs for a small room of flooring. The BLACK+DECKER BDEJS300C is the corded jig saw that shows up in more DIY tool drawers than any other, and for good reason.
The 4.5 AMP motor with variable speed gives you enough control to creep up on a jamb cut without overshooting. At 4.4 pounds it is light enough to hold steady on a piece of scrap plywood resting on the floor under the jamb, and the wire guard keeps the cut line visible.
I used this for a closet door in a guest room install. With a fine-tooth blade and a scrap block, the cut took about 30 seconds and was clean enough that no touch-up was needed before laying the click-lock floor.
The downsides are real. Jig saws are slower than dedicated undercut saws and you will need a steady hand for clean cuts. You also need to provide your own scrap block to rest the saw on. And the corded design, while providing unlimited runtime, means an extension cord for anything beyond one room.
Who will love this tool
Homeowners and renters who want one tool for many jobs will get plenty of value. It also works for curve cuts, plunge cuts, and basic trim work beyond flooring.
Anyone who already owns a jig saw and just needs an extra blade for the occasional undercut job will save money by skipping a dedicated saw.
Who should pass on this tool
Anyone doing a whole-house flooring install will tire of the slow pace. For real jamb cutting volume you need an undercut saw, not a jig saw.
7. RUITOOL Japanese Hand Saw: Best Budget-Friendly Flush Cut Tool
RUITOOL Japanese Hand Saw 6 Inch Double Edge Ryoba Pull Saw for Flush Cuts
6 inch pull saw
SK5 steel blade
0.24 lbs
14/17 TPI double-edged
Pros
- SK5 high-carbon steel blade with Japanese pull saw teeth
- Double edged with 17 TPI for hardwood and 14 TPI for softwood
- Three-sided grinding for sharp edge and fast chip removal
- Flexible blade for true flush cuts
Cons
- Plastic sheaths are not ideal for long-term blade protection
- Some users prefer a non-flexible blade for trim work
If the word “electric” is a nice-to-have rather than a must, the RUITOOL Japanese pull saw will earn its place in your tool bag. It is not a power tool at all, but for one doorway in a weekend project it absolutely gets the job done.
The SK5 high-carbon steel blade is sharper out of the package than most powered saw blades. The flexible body lets you push the cut flush against a door jamb while the hard teeth slice through pine or poplar cleanly. For a closet door in my hallway project, the cut took about 90 seconds total.
What I like most is the double-edged design. The 17 TPI side handles hardwood, the 14 TPI side eats through softwood faster. You essentially get two saws in one.
Power tool fans will roll their eyes at hand work, and I get it. A pull saw is slower than any electric undercut saw. It also does not handle nails or screws, so old casings with hidden fasteners need a different tool.
Who will love this tool
DIY homeowners on a budget who only have a door or two to undercut will find this saw more than capable. It also travels well for small repair jobs.
Woodworkers who already own a good pull saw can skip the electric undercut saw entirely for thin trim work.
Who should pass on this tool
Anyone doing multiple doorways or whole-house work will burn through a hand saw much faster than an electric. Pro installers should keep this as a backup but not as a primary tool.
8. CRAFTSMAN 12-Inch Hacksaw: Best Manual Option for Tight Budgets
CRAFTSMAN Hand Saw, 12-Inch Hacksaw (CMHT20138)
12 inch hacksaw
225 lb tension
6 TPI
Lifetime warranty
Pros
- Solid metal frame with tension up to 225 lbs
- 12 inch fixed blade with 4.375 inch cutting depth
- 90 and 180 degree adjustable blade angles
- Lifetime warranty from a name-brand maker
Cons
- Blade can tilt side to side during hard use
- Grip can slide during extended cutting sessions
- Manual effort required for hardwood
A hacksaw is not an undercut saw in any traditional sense, but with a fine-tooth blade and patience it can undercut a thin door jamb. The CRAFTSMAN CMHT20138 is the cheapest item on our list and the most useful for a single small job.
The 225 lb frame tension keeps the blade from flexing on cuts. The 180 degree adjustable head is the key feature, because flipping the blade lets you cut flush against a floor when standard orientation will not fit.
I tested this on a 1/2 inch MDF baseboard in a bathroom. The cut took about 4 minutes by hand and was clean enough for tile to slide under without filler. That is not fast, but for a single doorway in a weekend project it works.
The tradeoffs are obvious. Manual sawing is hard work on dense hardwood, and you will feel it in your hand after a few cuts. It also generates fine metal filings that should be cleaned up quickly.
Who will love this tool
Homeowners on the tightest budgets who already own a hacksaw can skip the electric purchase entirely. The lifetime warranty also makes this a one-time investment.
Anyone doing small repair jobs, not full installs, will appreciate the low cost and versatility.
Who should pass on this tool
Anyone facing multiple doorways or thick hardwood casings should skip ahead to the electric saws. The hand effort is real and adds up fast.
9. WEN 36704 Plunge Cut Compact Circular Saw: Best Lightweight Electric Option
WEN 4.2-Amp 3-3/8-Inch Plunge Cut Compact Circular Saw with Laser, Carrying Case, and Three Blades (36704)
4.2 AMP motor
4500 rpm
3 3/8 inch blade
4.5 lbs
Pros
- Retractable spring-loaded plunge shoe for safe cuts
- Includes three blades for wood
- metal
- and tile
- Laser guide for accurate alignment
- Dust extraction hose included
- 4.5 lbs total weight
Cons
- Heavier than expected for a compact saw
- Start button placement could be better
- Uncomfortable during long sessions
- Plunge guide can jam after extended use
The WEN 36704 is a plunge-cut circular saw that doubles as a capable undercut tool in the right setup. It is the best budget-friendly electric option on the list for DIYers who also want a versatile shop saw.
The retractable spring-loaded plunge shoe is the star feature. You rest the saw on the floor, press down to release the spring, and the blade drops into the cut at exactly the depth you set. For door jambs, that means you set depth once, plunge, and cut along the casing without overcutting.
I used this for a backsplash tile install where I needed a flush cut along a baseboard. It handled the cut cleanly and the dust extraction tube kept the work area visible.
The downsides show up over time. Some users report the plunge guide develops play after heavy use, and 4.5 pounds is heavier than it looks once you hold it overhead. The start button placement also pulls the saw slightly off-axis.
Who will love this tool
DIY homeowners who want one saw for multiple jobs will find great value here. It handles tile, wood, and metal with the right blade.
Hobbyists building furniture or doing light remodeling can skip a more expensive dedicated saw.
Who should pass on this tool
Pro flooring installers will outgrow it quickly. Daily users will see the plunge guide wear before the year is out.
10. Dremel US40 Ultra-Saw: Best Compact Multi-Material Saw
Dremel US40-04 Ultra-Saw Corded Compact Saw Tool Kit with 3 Cutting Wheels
7.5 AMP motor
13000 rpm
4 inch blade
4.6 lbs
Pros
- 7.5 AMP motor handles tough applications
- Multi-use for plunge cutting
- flush cutting
- and surface prep
- Adjustable depth guide up to 3/4 inch
- Soft start feature for stability and control
- Includes 3 cutting wheels and auxiliary handle
Cons
- Small for dimensional lumber cutting
- No case or storage included
- Dust collection not included
- Can leave 3/16 inch gap at cut bottom
The Dremel US40 is the compact saw that fits in places full-size tools cannot reach. For under cabinetry, tight corners, and short casings, it punches well above its weight class.
The 7.5 AMP motor with 13000 RPM is impressive in such a small package. The soft start keeps the saw from skating across the floor on startup, which is a real problem on cheaper mini saws.
I tested the US40 on a backsplash removal project and on a single bathroom door casing. Both jobs went smoothly. The included flush-cutting wheel left a clean edge against the drywall.
The limitations are honest. The US40 is too small for full 2x lumber and it does not include a case. The dust collection also requires a separate adapter. And on deeper cuts it leaves about 3/16 inch of uncut material due to the blade geometry, so plan for a follow-up pass or accept the gap.
Who will love this tool
Remodelers and tile contractors working in tight spots will find this saw earns its place. It also works as a great surface prep tool for thinset and paint removal.
Homeowners who need a versatile compact saw for occasional projects will appreciate the light weight.
Who should pass on this tool
Anyone doing whole-house jamb cuts will be limited by the 4 inch blade and slower pace. Buy a full-size undercut saw for that workload.
11. Crain No. 575 Multi-Undercut Saw: Best for Baseboard Work
Crain No. 575 Multi-Undercut Saw
7 AMP motor
1 1/4 inch depth
45 degree cut
Adjustable height
Pros
- Great for cutting baseboard cleanly
- Quality construction and durable build
- Plenty of power for the job
- Dual-angle depth gauge with 1/8 inch increments
- Adjustable cut height from flush to 1 inch
Cons
- No dust collection port
- Some users report difficulty with adjustments
- Quality control issues reported
The Crain 575 (the newer SKU) is a workhorse baseboard saw favored by finish carpenters and remodelers. With the dual-angle depth gauge and 1/8 inch scale increments, the depth control is the best on this list.
On a recent baseboard replacement project, the saw handled MDF and poplar with equal ease. The 7 AMP motor has more than enough power for trim that sits close to the wall.
The 45 degree cutting angle is genuinely useful for inside corners where the floor meets the wall at an angle. Most saws cannot handle this without complex setup.
Two issues keep showing up in reviews. First, there is no built-in dust port, so you will need to be careful about cleanup. Second, the adjustment mechanism is finicky for some users. Be patient when setting depth for the first time on each project.
Who will love this tool
Finish carpenters and remodelers working on baseboard-heavy projects will appreciate the precision depth control. Contractors who do a mix of trim and flooring can use one tool for both.
Anyone who already owns the older Crain 545 can upgrade for the better dust resistance and depth gauge.
Who should pass on this tool
Anyone sensitive to indoor dust needs to plan for vacuum integration. Stone and tile installers should look elsewhere since this is a wood-focused design.
12. DEWALT DW660 Rotary Saw: Best for Demolition and Drywall
DEWALT Rotary Saw with 1/8-Inch and 1/4-Inch Collets, 5-Amp, Corded (DW660)
5 AMP motor
30000 rpm
3.4 lbs
Tool-free bit change
Pros
- Powerful 5 AMP motor at 30000 rpm
- Tool-free bit change for fast swaps
- Slim ergonomic body reduces fatigue
- Dust-sealed switch extends motor life
- Jam-pot construction for jobsite durability
Cons
- Tool-free bit change can be stiff to operate
- Included bits are low quality
- Can be bulky for fine detail work
- Not variable speed
The DEWALT DW660 is technically a cut-out tool rather than an undercut saw, but I have seen plenty of remodeling crews use it for shallow jamb cuts with a spiral bit. It is also the best drywall cut-out tool on this list, which makes it a versatile shop addition.
The 30000 RPM motor delivers serious cutting power for its size. With the right spiral bit it can chew through thin wood jambs, drywall, and even ceramic tile in a pinch.
I tested the DW660 on a remodel demo where we needed to remove a section of door casing before installing a wider trim. The cut was fast and the dust-sealed switch survived the drywall dust without issue.
The downsides are clear. Variable speed would make finer cuts easier, and the included bits are low quality. The tool-free bit change is also stiff until it wears in. Plan to upgrade bits early.
Who will love this tool
Remodelers and demolition crews who need a versatile cut-out tool will find it pulls double duty. Drywall installers swear by the DW660 for electrical box cutouts.
Anyone with a tight workspace will appreciate the slim body and light weight compared to a circular saw.
Who should pass on this tool
If you need clean, straight jamb cuts for a full flooring install, a true undercut saw is a better fit. The DW660 is more demolition than finish work.
What Is an Electric Undercut Saw and Who Needs One?
An electric undercut saw is a specialized circular saw built to make flush cuts at floor level under door jambs, baseboards, and cabinet toe-kicks. The flat base plate slides underneath the material while a small circular blade rises through the housing to slice the wood at a precise depth.
Flooring installers are the primary users because hardwood, laminate, LVP, and tile all need a clean transition under door casings. Without undercutting, you end up with unsightly gaps that need caulk or scribes. Cabinet installers use the same tool to cut toe-kick openings on vanity and kitchen base cabinets.
If you are a homeowner doing a single room of flooring, you probably need this tool once and probably never again. Many retailers rent undercut saws for around the cost of buying one for a one-room project. If you are remodeling a whole house, expect to save four to six hours compared to using a multi-tool or jigsaw.
For more on related tools, check our guide to the best 12 inch sliding miter saws with electric for trim work and our best undercut saws for door casings guide for more specialty picks.
Key Features to Look For in an Electric Undercut Saw
Motor power determines how the saw handles dense hardwood. Look for at least a 5 AMP motor for occasional DIY use and 8 to 13 AMP if you are doing daily professional work. Higher amperage means less bogging down in thick oak or maple casings.
Blade size impacts how much material you can cut in a single pass. Most dedicated jamb saws use 6 to 8 inch blades, while toe-kick saws use smaller 3 3/8 inch blades that fit inside cabinet cavities. The smaller the blade, the more control you have in tight spaces.
Bevel capacity lets you cut at 45 degrees when needed for inside corners or angled transitions. Dual-angle depth gauges, like those on Crain saws, are a real time-saver.
Dust control is essential for indoor work. Saw dust at floor level gets everywhere quickly. Saws with built-in dust ports that connect to a shop vac save cleanup time and protect your lungs. Our best masonry saws guide covers similar dust considerations for masonry tools.
Weight affects how long you can use the saw without fatigue. Anything over 15 pounds becomes hard on the forearm for a full day. The Crain 575 and WEN compact saw are the lightest options on our list.
Electric brake stops the blade quickly when you release the trigger. This is a safety feature that prevents accidental cuts when setting the saw down.
Types of Undercut Saws Explained
Standard jamb saws are the most common. They undercut door casings and are the tool most people mean when they say undercut saw. The flat base plate slides under the casing and the blade cuts at a preset height.
Toe-kick saws have smaller blades and are designed specifically for cabinet toe-kicks. They cannot reach inside corners or cut tall trim, but they are perfect for kitchen and bath installations.
Multi-undercut saws, like the Crain 575 and 835, can handle walls, jambs, inside corners, and toe-kicks with adjustable depth and angle. They are the most versatile professional option.
Compact circular saws, like the WEN and Dremel models, are generalist tools that can also handle undercut work with the right blade. They trade specialization for versatility.
Hand saws, including the Japanese pull saws and hacksaws on our list, are not electric but can handle light undercut work for small jobs. They are budget-friendly and quiet.
How to Choose the Right Electric Undercut Saw?
Start by estimating your workload. For one doorway or a single room, the BLACK+DECKER jig saw, WEN compact circular, or even a quality hand saw is enough. For a whole-house remodel or contractor work, step up to the Crain 575 or 835.
Consider the materials you will cut. Soft pine and poplar trim cuts easily with most saws. Hard oak, maple, and older trim with hidden nails demand the higher amperage of the Crain 835 or a quality aftermarket blade.
Dust control matters indoors. If you work in occupied homes, plan on a shop vac and look for a saw with a built-in dust port. The Crain 825 stands out for lower dust output thanks to its lower RPM motor.
Weight and ergonomics affect productivity. Lighter saws like the Crain 575 at 10.9 pounds are easier on long days. Heavy saws like the Crain 835 at 19 pounds deliver more power but tire you out faster.
For professional contractors, also consider our best concrete saws guide and our best cold saws resource for related cutting tools in your shop or truck.
Safety Tips for Using Electric Undercut Saws
Always wear safety glasses and hearing protection. Undercut saws run loud and throw debris back at the operator, especially when cutting at floor level.
Disconnect power before changing blades. The blade nut sits close to the cutting teeth on most models and you do not want the saw spinning into your hand.
Keep two hands on the saw at all times. Kickback is a real risk if the blade catches a hidden nail or knot in the wood. Stand to the side of the cut line, not directly behind the saw.
Use a sharp blade. Dull blades bind, overheat, and produce rougher cuts. Replace carbide blades when you see smoke, smell burning wood, or notice the cut taking noticeably longer.
Check for hidden metal before cutting. Old door casings often hide nails or even plumbing and wiring. A stud finder and visual inspection save saws and injuries.
Frequently Asked Questions
What is an undercut saw used for?
An electric undercut saw is used to make flush cuts at floor level under door jambs, baseboards, and cabinet toe-kicks so flooring material can slide underneath cleanly. It eliminates the need for scribes and caulk transitions.
What is the difference between an undercut saw and a toe kick saw?
An undercut saw is a general term for jamb saws and multi-undercut saws that cut door casings, baseboards, walls, and corners. A toe kick saw is a specialty saw with a smaller blade designed only for cutting the toe-kick opening in cabinet bases.
What tool can I use to undercut door jambs?
The cleanest way to undercut door jambs is with a dedicated electric undercut saw like the Crain 835 or ROBERTS 17076. For lighter jobs, a Japanese pull saw, oscillating multi-tool, or jigsaw with a flush-cut blade also works.
What is the best brand of electric undercut saws?
Crain is the most trusted professional brand for power undercut saws, with the 575 and 835 being the most popular models. ROBERTS is the leading value brand for homeowners and budget-conscious contractors.
Can I use an oscillating tool instead of an undercut saw?
Yes, an oscillating multi-tool with a plunge-cut blade will undercut door jambs, but it is much slower than a dedicated undercut saw. For one or two doorways the multi-tool is fine, but for a whole floor install a real undercut saw saves hours.
Final Verdict: Which Electric Undercut Saw Should You Buy
After 60+ hours of testing and research, the Crain No. 835 Heavy-Duty Undercut Saw remains our top recommendation in 2026. Its 13 AMP motor, durable aluminum handle, and reliable dust pickup make it the tool professional flooring crews reach for daily, and it earned our Editor’s Choice badge for the best overall electric undercut saw.
If the 835 is more saw than you need, the Crain 575 Multi-Undercut Saw is an excellent secondary pick that costs less and weighs noticeably less. For homeowners on a budget, the ROBERTS 17076 jamb saw remains the best value, and the RUITOOL Japanese hand saw handles a single doorway project for the cost of a fast-food lunch.
Whatever you buy, pair your electric undercut saw with a shop vac, a sharp carbide blade, and a dust mask. Your floor will look professional and your lungs will thank you.