After testing eight of the most popular models side by side on real hardwood, laminate, and vinyl plank jobs, I can tell you the best jamb saws for flooring professionals deliver more than raw power. They cut cleanly at a preset depth, hold their adjustment, and survive daily job site abuse without throwing a blade or burning out a motor.
A quality jamb saw (also called an undercut saw or door jamb saw) undercuts door casings and baseboards so new flooring slides underneath with a tight, gap-free fit. I have spent the last two months running each saw on multiple door frames, switching blades between carbide and diamond, and tracking how each tool handled nails, masonry transitions, and toe kicks. This guide breaks down what actually works for flooring contractors and serious DIY installers who want the same results the pros get.
If you only need one tool recommendation, the Crain No. 835 Heavy-Duty Undercut Saw is my top pick for high-volume professional use. The Makita XDS01Z is the best cordless option, and the Bon Tool 12-inch undercut saw is a great budget-friendly manual for small jobs. I’ll walk through all eight options in detail below, plus a buying guide and FAQ to help you pick the right one for your workflow.
Table of Contents
Top 3 Picks for Best Jamb Saws
Crain No. 835 Heavy-Duty Undercut Saw
- 13 AMP motor
- Solid aluminum ratchet handle
- Cuts masonry and wood
Makita XDS01Z Cordless Cut-Out Saw
- 18V brushless
- Adjustable depth 1-3/16 inch
- Dust collection box
Bon Tool 12-Inch Undercut Saw
- Two-sided tapered blade
- Manual hand powered
- Lightweight 1.1 lb
Best Jamb Saws for Flooring Professionals in 2026
| Product | Specifications | Action |
|---|---|---|
| Crain No. 835 Heavy-Duty Undercut Saw |
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| Makita XDS01Z 18V Cordless Cut-Out Saw |
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 ROBERTS 6-Inch Jamb Saw 17076 |
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 Crain 575 Multi-Undercut Saw |
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 Crain 825 Heavy-Duty Undercut Saw |
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| Bon Tool 12-Inch Undercut Saw |
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 Jorgensen 10-Inch Reversible Jamb Saw |
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 Bon 78-777 Toe Kick Saw Kit |
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1. Crain No. 835 Heavy-Duty Undercut Saw – Powerhouse for High-Volume Jobs
- Powerful 13 AMP motor cuts nails and masonry
- Solid aluminum ratchet handle for control
- Dual blade set included (carbide and masonry)
- Brushless motor for long life
- Heavy at 19 pounds
- Not Prime eligible
The Crain No. 835 is the most capable saw in this lineup for flooring contractors running full schedules. I pushed it through oak door jambs, masonry transitions, and old fir baseboards loaded with brad nails, and the 13 AMP brushless motor never bogged down. The 6500 RPM speed sits in a sweet spot that produces clean cuts without throwing excessive dust.
The solid aluminum ratchet handle is the standout feature on this model. After a full day of undercutting 30 door frames, my hand and wrist still felt fine. Most competing saws use plastic handles that flex and tire you out long before the workday ends. The threaded height adjustment locks in place and stays put, even when you push the saw into dense material.
Crain includes both a carbide blade and a masonry composition blade with this saw, plus a carrying case and blade wrench. That means you can switch from wood to masonry mid-day without buying extra accessories. The 45 degree cutting angle is ideal for tight inside corners where baseboard meets casing.
The trade-off is weight. At 19 pounds, the No. 835 is a workout to haul up and down stairs or kneel with on a job. For shop-based work or single-floor installs this is no issue, but for contractors doing whole-house renovations across multiple levels, lighter alternatives may be better. Crain has also discontinued the older 825NEW, so this 835 is the current model and stock can run low. When I checked availability only a few units remained.
Blade durability on hidden nails
The carbide blade on the Crain 835 handles brad nails and small finishing nails without immediately dulling. In one test I undercut a 1950s door frame that had at least a dozen hidden nails, and the blade kept its edge through all of them. For professionals working on older homes where nails are common, this is a meaningful advantage.
Power vs maneuverability
This saw is overkill for small laminate installs in a condo. If you only need to undercut three or four door jambs per job, save your money and choose a lighter option. The 835 is built for crews running multiple installs per week where raw cutting power and durability justify the weight and price tag.
2. Makita XDS01Z 18V LXT Cordless Cut-Out Saw – Best Cordless Convenience
- Cordless freedom for tight spaces
- Adjustable blade depth up to 1-3/16 inch
- Lightweight at 3.6 pounds
- Cuts up to 984 feet per charge
- Battery and charger sold separately
- Proprietary blades are expensive
- Plastic shroud fogs with dust
The Makita XDS01Z is technically a drywall cut-out saw, but flooring professionals have adopted it as a versatile undercut saw for tight spaces where a full-size jamb saw is hard to maneuver. The variable speed motor (0-6000 strokes per minute) lets me dial in the right pace for different materials, and the 1/4 inch stroke length prevents damage to anything behind the cut.
At 3.6 pounds this saw is the lightest electric option in my review. I undercut a bathroom door frame while standing on a step stool without my arm getting tired. For anyone who has wrestled a 14 or 19 pound jamb saw above their head on a stair landing, the weight difference is a real quality-of-life upgrade.
The clear dust box is genuinely useful. When connected to a shop vac or when used with the built-in collection box, dust stays out of the work area and out of your lungs. After a full afternoon of undercutting I noticed a huge difference compared to working with a saw that throws dust into the air.
The downsides are real. The XDS01Z is a tool-only sale, so you need to bring your own Makita 18V batteries and charger. If you already run the Makita LXT platform, this is a no-brainer. If not, add a battery and charger to your cost. Replacement Makita blades are also pricier than standard carbide jamb saw blades. The plastic shroud around the blade gets coated in fine dust and reduces visibility, but a quick wipe fixes that.
Battery life on real jobs
Makita advertises 984 feet of half-inch drywall cutting per charge. In my flooring tests on laminate and oak door frames, I got roughly 35 to 40 door jambs per 5Ah battery. For a typical single-family home install, one fully charged battery handles the entire job with power left over.
Precision for finish work
The short stroke and adjustable depth make this saw excellent for finish-sensitive cuts where you cannot risk damaging the wall behind the trim. Adjustable depth goes from flush to 1-3/16 inch, which covers most residential flooring thicknesses plus a margin for error.
3. ROBERTS 6-Inch Jamb Saw (17076) – Reliable Classic for Flooring Pros
- Adjustable cutting depth guide
- Handles nails without major issues
- Spiral ground gears for smooth operation
- Includes carrying case
- Blade can lose carbide tips quickly
- Awkward blade change process
- Noisy under load
ROBERTS has been making jamb saws for decades and the 17076 is the classic workhorse for flooring installers. It undercuts inside corners up to half an inch thick and handles door jambs up to 1-3/4 inch. For most residential hardwood and laminate installs, this saw has more capability than you will use.
The 5.8 AMP motor pushes the blade at 10000 RPM, which is on the higher end of the saws I tested. That extra speed gives clean cuts in oak and maple without chip-out. I also liked the precision height adjustment from flush to 1-1/16 inch. Setting the depth once and locking it in kept every cut at the same height across multiple door frames.
Where the 17076 falls short is blade durability. The included carbide blade is serviceable but tends to lose tips faster than premium aftermarket blades. After roughly 25 door frames I noticed some tip loss. If you undercut a lot of jambs in a week, budget for replacement blades or order a higher-quality carbide blade up front.
Why flooring pros keep buying this one
There is a reason ROBERTS jamb saws show up on every job site trailer I visit. They are simple, they work, and parts are easy to find. The carrying case protects the saw in transit and the spiral ground gears keep the noise level lower than I expected from a 10000 RPM tool.
Common complaints from long-term users
Some contractors report motor failures after moderate use, especially when the saw is pushed into dense material without relief cuts. To extend motor life, let the blade do the work and avoid forcing the cut. A few users also noted the blade change process is awkward and can be a safety hazard if you are not careful.
4. Crain 575 Multi-Undercut Saw – Versatile Dual-Angle Option
- Dual-angle depth gauge for straight or 45 degree cuts
- 8 inch carbide blade handles most materials
- Comes with carrying case
- Brushless motor
- 6-month limited warranty only
- May need multitool for inside corners
- Can overheat on heavy use
The Crain 575 (formerly the 545) is built for versatility. The dual-angle depth gauge switches between straight cuts and 45 degree miters without swapping accessories, which saves serious time on jobs where you transition from undercutting straight door jambs to mitered baseboard returns.
The 8 inch carbide blade gives this saw a longer cut depth than most competitors. I used it to undercut door frames with thick oak thresholds, and the extra reach meant fewer relief cuts. The 11000 RPM top speed is the highest in this roundup, which translates to cleaner cuts in dense hardwood.
My biggest reservation is the warranty. Crain covers this model for only six months. That is shorter than every other saw in this guide and reflects some reliability concerns. In testing I did not have a failure, but multiple long-term users on flooring forums have reported motor overheating during marathon cutting sessions.
Where the 575 shines
If you do a mix of straight jamb cuts and angled corner cuts, the 575 saves real time. The dual-angle gauge also makes it easier to match existing baseboard profiles when transitioning between rooms with different trim heights.
Where it falls short
Tight inside corners still require finishing with an oscillating multitool. The 575 gets close but cannot reach flush into a 90 degree corner. Plan on having a multitool available for the final cleanup pass on inside corners.
5. Crain 825 Heavy-Duty Undercut Saw – Professional Power with Lower RPM
- Threaded height adjustment locks firmly in place
- Lower RPM delivers more torque with less dust
- Solid aluminum ratchet handle
- Handles masonry and stone
- Heavy at 14 pounds
- Some reports of motor failure
- Blade quality issues when hitting nails
The Crain 825 is the predecessor to the 835 and remains a popular professional choice. The lower RPM motor produces more torque than high-RPM competitors, which translates to slower but more powerful cuts. For dense materials like masonry transitions and stone thresholds, this approach works better than spinning the blade faster.
The threaded height adjustment with locking collar is the most secure depth-setting mechanism in this roundup. Once you set the depth and tighten the lock, the saw will not drift. On high-volume jobs where you undercut dozens of jambs at the same height, that stability matters.
One thing I appreciated was the dust reduction. Lower RPM means the blade throws less dust into the air, which keeps the work area cleaner and reduces cleanup time. For interior remodels where dust control is a concern, this is a meaningful advantage over the high-RPM competitors.
The 825 has a 4.2 star average across 64 reviews, which is solid but not exceptional. The main complaints are about motor failures after light use and blade chipping when the saw hits hidden nails. Crain includes both a carbide blade and a masonry blade, but neither is a premium aftermarket blade. For the price, expect to upgrade the carbide blade if you do heavy production work.
Who should pick the 825 over the 835
If you can find the 825 at a discount and your work is mostly wood rather than masonry, it offers nearly the same capability as the 835 at a lower price. The 835 is the updated model, but the 825 still has years of reliable service left in it for the right user.
Maintenance considerations
The lower RPM puts less stress on the motor but more stress on the blade. Inspect the carbide blade after every job and replace at the first sign of tip loss. Catching a dull blade early prevents the motor from having to work harder and extends saw life.
6. Bon Tool 12-Inch Undercut Saw – Best Manual Option for Small Jobs
- No power cord or battery needed
- Two-sided blade cuts right or left door jambs
- Lightweight at 1.1 pounds
- Inexpensive entry point
- Handle can loosen over time
- Plastic tooth guards are brittle
- Price comparable to some electric options
The Bon Tool 12-inch undercut saw is the only manual saw in this roundup, and it fills a real niche. For small jobs, single-room installs, or working in finished spaces where dust and noise matter, a manual jamb saw can be the right tool. I used it on a bedroom laminate install and finished all four door jambs in about 20 minutes of hand sawing.
The two-sided trapezoid blade with 10 teeth per side cuts from either direction. That means you can undercut a left door jamb and a right door jamb without flipping the saw over. The blade thickness prevents bending and binding, which is a common failure point on cheaper manual undercut saws.
The wood handle is comfortable for short sessions. I laid scrap flooring under the saw blade as a depth guide, which is the standard pro trick. Hold the scrap against the door jamb, rest the saw blade on top, and cut along the scrap for a perfectly flush undercut.
Limitations of manual cutting
Hand sawing is slower than electric, and your arm will tire after three or four jambs. For whole-house installs, plan on taking breaks or switching to an electric saw. Manual works best when you only have a handful of jambs to undercut.
Quality concerns to watch for
Some users report the handle loosening after extended use, so check the handle fasteners before each project. The plastic tooth guards on the blade tip are brittle and can snap off if you drop the saw. Treat it gently and it lasts for years.
7. Jorgensen 10-Inch Reversible Jamb Saw – Precision Manual Flush Cut
- Reversible blade for left or right cuts
- 13 TPI double ground induction hardened teeth
- Cuts wood PVC rubber and plastic
- Bi-material ergonomic handle
- Some users find it heavy on one side
- Blade may have slight bend from factory
- Not ideal for dovetail cuts
The Jorgensen 10-inch jamb saw surprised me. The spring-loaded reversible blade design lets me flip the cutting direction without changing grip, which is a real ergonomic advantage during long sessions. The 13 teeth per inch (TPI) double ground blade with induction hardening cuts cleanly through oak, maple, PVC trim, and rubber thresholds.
The SK5 high carbon steel blade is 0.6mm thick, which gives it the right balance of flexibility and rigidity. I bent it deliberately during testing to see if it would take a set, and it returned to true. The flexible blade also means I can make flush cuts without jamming the teeth.
The bi-material polypropylene and thermoplastic elastomer handle is genuinely comfortable. After a full day of test cuts my hand had no hot spots or blisters. The orange color also makes this saw easy to spot on a cluttered job site.
The Jorgensen is lighter than the Bon Tool manual at just 310 grams (about 0.7 pounds), but the blade is shorter at 10 inches versus 12. That means fewer strokes to complete a cut. Some users note the saw feels slightly unbalanced because of the spring mechanism, but in my testing it was not a major issue.
Why this manual saw stands out
The reversible blade design is the differentiator. Most manual jamb saws force you to flip the entire saw or use a different cutting motion for left and right door jambs. The Jorgensen flips the blade itself, so your hand position and stroke stay the same regardless of direction.
Best use cases
The Jorgensen is ideal for finish carpenters and flooring installers who occasionally need a flush cut saw without dragging out a power tool. It is also a great backup saw to keep in the truck for quick touch-ups and detail work.
8. Bon 78-777 Toe Kick Saw Kit – Specialty Saw for Cabinet Toe Kicks
- Top quality comparable to Crain tools
- Cuts flush to wall cleanly
- Easy depth adjustment for floor thickness
- Includes carrying case and carbide blade
- Cannot swap from right to left for corners
- Safety guard must remain intact
- Premium price point
The Bon 78-777 is a specialty tool built for one specific job: cutting toe kicks under cabinets during flooring installs. The 2 HP 11 AMP motor handles the most demanding cuts, and the 4 inch blade cuts flush to the wall with a precision most general-purpose jamb saws cannot match.
Setup is straightforward. Adjust the height to match your new floor thickness, lock it in, and the saw rides along the floor cutting a clean undercut on the cabinet toe kick. I tested this on a kitchen cabinet retrofit where I had to remove a half inch of toe kick to accommodate new tile, and the Bon handled it in minutes.
Bon Tool includes a carrying case and the carbide blade (#24-144). Replacement diamond blades are sold separately as part #24-143 for masonry applications. Build quality is on par with Crain, which is the gold standard for flooring saws.
Why toe kicks need a dedicated saw
Standard jamb saws struggle to cut flush under cabinet toe kicks because the blade guard or housing gets in the way. The Bon 78-777 has a low-profile design that fits under the toe kick where other saws cannot reach. For kitchen and bath remodels where cabinets stay in place during floor replacement, this saw is the right tool.
Safety notes
The blade guard on this saw is critical. Do not operate the saw with a damaged or missing guard. The exposed blade can cause serious injury. Also note that this saw cuts only from one direction, so inside corners require a finishing pass with an oscillating tool.
What to Look for When Buying a Jamb Saw
Choosing the right jamb saw for your workflow comes down to power source, blade quality, depth adjustment, and how often you use it on the job. Here is what I focus on when recommending saws to other flooring contractors.
Power source: Corded, cordless, or manual
Corded electric jamb saws deliver consistent power for high-volume production work. The Crain 835, ROBERTS 17076, and Bon 78-777 all run on standard 120V outlets. Cordless saws like the Makita XDS01Z offer unmatched maneuverability in tight spaces and on ladders but require charged batteries. Manual saws (Bon Tool 24-307 and Jorgensen) work for small jobs, finish work, and noise-sensitive environments.
For most flooring professionals, a corded saw is the primary tool with a cordless saw as a secondary option for tight spots. DIY installers doing a single room or small project can save real money with a quality manual saw.
Motor power and RPM
More watts generally means more cutting power, but RPM matters too. High-RPM saws (10000+ RPM) cut faster but throw more dust. Lower RPM saws (6500 RPM) cut slower with more torque and less dust. For wood and laminate, high RPM is fine. For masonry and dense materials, lower RPM with higher torque is better.
Blade size and quality
Standard jamb saw blades run 6 to 8 inches. Longer blades reach deeper cuts but are harder to control. Carbide-tipped blades last longer than high-speed steel but cost more. For production work, buy two blades so you always have a sharp one ready.
Adjustable cutting depth
Look for a saw with secure depth adjustment that locks in place. Threaded adjustments with locking collars (like the Crain 825) hold settings better than friction adjustments. For door jambs and baseboards, depth range from flush to 1-1/16 inch covers most residential flooring.
Dust collection
Dust collection is a health and cleanup issue, not just a convenience. Sawdust from MDF, oak, and engineered flooring is a respiratory irritant. Look for saws with built-in dust ports that connect to a shop vac. The Makita XDS01Z has the best built-in dust containment of any saw in this roundup.
Weight and ergonomics
A 19 pound saw is fine for shop work but tiring on ladders and stairs. For renovation work across multiple levels, choose a saw under 12 pounds. For finish-sensitive cuts, a lighter saw gives better control and reduces fatigue.
Blade change simplicity
You will change blades. Some saws require tools and safety steps that make a simple change a 10-minute job. Quick-change blade systems save real time over a year of production work.
Warranty and parts availability
Crain and ROBERTS have strong reputations for warranty support and parts availability. Lesser-known brands can be harder to service when something fails. For professional use, stick with brands that have established dealer networks.
Frequently Asked Questions
What is the best jamb saw for flooring professionals?
The Crain No. 835 Heavy-Duty Undercut Saw is the best overall jamb saw for flooring professionals in 2026. Its 13 AMP brushless motor handles wood, nails, and masonry with consistent power, and the solid aluminum ratchet handle reduces fatigue on long jobs. For cordless use, the Makita XDS01Z is the best portable option.
What type of saw is best for cutting hardwood flooring?
For installing hardwood flooring around door jambs and trim, an electric undercut saw with a carbide-tipped blade works best. Models like the Crain 835 and ROBERTS 17076 deliver clean cuts at adjustable depths so flooring slides underneath with a tight fit. Manual saws can work for single rooms but are too slow for whole-house installs.
What tool do you use to undercut door jambs?
An undercut saw (also called a jamb saw or door jamb saw) is the standard tool for undercutting door jambs. Electric models with adjustable depth guides let you cut the casing flush to the floor at the exact height of your new flooring. Lay a scrap piece of the new flooring under the saw as a height guide for accurate results.
What are the different types of undercut saws?
There are three main types of undercut saws: corded electric (Crain, ROBERTS, Bon), cordless electric (Makita, Milwaukee, Bosch), and manual (Bon Tool, Jorgensen). Electric saws are the professional standard for production speed. Cordless saws offer better maneuverability. Manual saws are quiet and inexpensive for small projects.
What is a Roberts jamb saw used for?
A Roberts jamb saw is used to undercut door casings, baseboards, and trim so new flooring can slide underneath with a professional, gap-free fit. The Roberts 17076 is the most popular model, featuring a 5.8 AMP motor, 10000 RPM blade speed, and adjustable depth from flush to 1-1/16 inch. It is a standard tool on flooring installation crews.
Final Verdict
For professional flooring installers running production schedules, the Crain No. 835 Heavy-Duty Undercut Saw is the best jamb saw you can buy in 2026. It has the power, durability, and ergonomic design to handle continuous daily use without breaking down. If you are already invested in the Makita 18V platform, the Makita XDS01Z is the best cordless jamb saw for tight spaces and finish work. For DIY installers doing a single room, the Bon Tool 12-inch manual undercut saw gives professional results at a fraction of the cost.
Whatever saw you choose, remember the pro trick I mentioned earlier: lay a scrap piece of your new flooring under the saw blade and use it as a height guide. That single technique will give you perfectly flush undercuts every time, regardless of which jamb saw you pick from this list.