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Rockler Undersized Plywood Router Bit Set

Specially designed to cut perfect-fitting grooves and dadoes for plywood that measures less than its stated nominal thickness.
Item #
88% of 100

Plywood is usually thinner than the nominal measurements indicate. As a result, regular size bits usually don't cut a tight-fitting dado. Fortunately, undersized dado bits like these will help your joinery fit perfectly, resulting in stronger assemblies and nearly invisible joint lines. This set includes the three most common sizes of straight bits for undersized plywood: 23/32" for 3/4" plywood, 31/64" for 1/2" plywood, and 15/64" for 1/4" plywood.

Rockler Undersized Plywood Router Bit Set

(1) 23/32" Straight Bit for 3/4" plywood

(1) 31/64" Straight Bit for 1/2" plywood

(1) 15/64" Straight Bit for 1/4" plywood

More Information
Brand Rockler
Weight 0.2500
Bit Type Straight
Shank Size 1/4"
Flutes 2
4.4 / 5.0
79 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
November 15, 2019
1 month ago
Time saving and accurate.
I'm just learning to use my router. This is better than my dado blade and makes a cleaner cut.
September 10, 2019
3 months ago
Woodworking Experience:
cuts precise dados. Wish the plywood was as accurate
September 3, 2019
4 months ago
Woodworking Experience:
Router bits worked well unfortunately my sears router is cheap piece of junk ! Got a better router (porter cable ).
Love the tools you guys sell !
August 1, 2019
4 months ago
Good Choice
They sure beat setting up the dado stack for small projects
July 21, 2019
5 months ago
Woodworking Experience:
Right on the money!
Undersized plywood fits the groove perfectly. Not loose, not too tight, but just right. Saves a lot of trial and error time.
April 29, 2019
over 2 years ago
Woodworking Experience:
Undersized plywood router bits
The fit is just right,no slop whatsoever.Should have gotten sooner!
April 17, 2019
8 months ago
Woodworking Experience:
Plywood bits
All three bits fit the plywood i tried a real time saver could use some 1/2 inch shank bits now
April 15, 2019
8 months ago
Woodworking Experience:
Precision Cuts
I purchased this set from Rockler and it exceeded my expectations. The cut and fit were exactly perfect. I highly recommend this product.
April 3, 2019
9 months ago
Woodworking Experience:
Great add to workshop
Have been using my table saw for many years to get a tight fitting rabbit cut for cabinetry. Finding these router bit just save me hours in making 5 cabinets. Very accurate and very sharp.
February 17, 2019
10 months ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 55 answers
Why did you choose this?
Rockler Store
Hope it works as advertised. If so, looking forward to easier dados for plywood.
Tom M on Dec 2, 2019
Rockler has the specific sizes I need.
David D on Nov 15, 2019
Hope it works as advertised. If so, looking forward to easier dados for plywood.
Tom M on Dec 2, 2019
because plywood is undersized
Robert H on Nov 29, 2019
Rockler has the specific sizes I need.
David D on Nov 15, 2019
Needed Them
Doug O on Oct 22, 2019
your mom
josh g on Oct 5, 2019
Nice bit set for plywood work.
Michael R on Sep 9, 2019
Building several cabinets and setting up the dado blade wastes build time!
Brett W on Aug 29, 2019
I chose this to make it easier to do dadoes.
Rodney on Aug 29, 2019
tired of setting up dado blades
ROBERT M S on Aug 26, 2019
starting some projects that require dados that I am making with plywood.
PAUL P on Aug 24, 2019
I bought it for a new project.
Dave G on Aug 19, 2019
needed for plywood dados on furniture project
William B on Aug 19, 2019
Been wanting both sets!
Wally G on Aug 7, 2019
Needed for project
Marion C on Aug 6, 2019
need to make some dados, don't currently have a table saw with a dado blade.
Brian Saxe C on Aug 4, 2019
When I made my first plywood cabinets, I used a 3/4” straight router bit with my router table to make dado grooves, which had some play, complicating box assembly, and leaving visible gaps. This bit set will take my cabinet making to the professional level.
Joseph F on Aug 4, 2019
Making plywood furniture and these bits create correct sized channel/dados.
Ken on Jul 23, 2019
Building some closet units using Walnut Plywood. Need to make several dados for shelves, etc. These are much faster to use then setting up dado stacks and trying to get the right fit.
Norman S on Jul 15, 2019
I'm going to be using both 1/4" and 3/4" plywood in a project and this appears to be the best deal for helping make sure they will have a snug fit.
Michael W on Jul 9, 2019
I chosed these undersized router bits to avoid loose joints.
Louis P on Jun 20, 2019
This makes it easier to route dados for plywood.
Charles N on Apr 27, 2019
Need bits to cut dados in undersized plywood.
Blake L on Apr 2, 2019
I wanted to make dados for using plywood a little quicker doing only one pass.
Denny M on Mar 29, 2019
Needed the flexibility of straight bits that can be used with typical plywood.
David R on Mar 24, 2019
It's in the name. 1/4 inch plywood is not 1/4 inch. Hoping this bit will provide a better fitting groove.
Tommy F on Mar 22, 2019
Plywood is always a 32nd thin
Luis O on Mar 7, 2019
I've been frustrated with sloppy, wide rabbets
Andrew D on Mar 6, 2019
Plywood is always undersized. These speed up the process.
James N on Feb 24, 2019
Because I am tired of having to make two passes with an undersized bit to make the dado match for plywood
Joel V on Feb 9, 2019
Building a plywood shelving unit, need tight fitting joints
James L on Feb 1, 2019
For shelving!
HikerMiker on Jan 14, 2019
For a more precise fit when making dados for plywood.
Gary P on Dec 21, 2018
As a gift.
Gary H on Dec 12, 2018
I need these sizes
Malcolm T on Dec 9, 2018
Because of the user reviews. Are usually don’t buy anything until I see what users say about a product.
Ronald K on Nov 26, 2018
cabinet making
Ed M on Nov 26, 2018
I felt these bitts could help eliminate the need for multiple passes to make cuts for the different sizes of plywood and prevent possible mistakes in the need for multiple passes.
Larry H on Nov 25, 2018
Good addition to the collection
Kyle S on Nov 25, 2018
Christmas gift
Wayne S on Nov 25, 2018
need it
Robert W on Nov 23, 2018
want to make a dado sled for my router
Marc S on Nov 21, 2018
For things I build with plywood the fit is great
Mark P on Oct 20, 2018
For use in making cabinets, bookcases etc.
Tim L on Oct 10, 2018
I needed these for using plywood joints.
cornflaske73 on Oct 8, 2018
I plan to build storage cabinets in the garage form plywood and wanted accurate bits for that project.
Robert D on Aug 4, 2018
hard to find at retail stores
James E. G on Aug 3, 2018
To have on hand for next woodworking project and sale price
Jim P on Aug 3, 2018
Planning to make drawers with plywood
Roger B on Jul 25, 2018
to build surface shelving in the shop using plywood
Joseph F on Jul 22, 2018
best selection and quality
Robert M on Jul 5, 2018
because plywood is undersized
Robert H on Nov 29, 2019
Needed Them
Doug O on Oct 22, 2019
is the price for 4 unit router bit?
saiful on Sep 21, 2015
BEST ANSWER: This is a 3 piece set of router bits with 1/4" shanks.
Do you sell 1" straight router bits?
Tom G on Jul 1, 2017
BEST ANSWER: I don't think they sell a 1" straight router bit. You can make the cut with 2 passes. Cut one side with a 3/4 router bit then cut the other side with the same 3/4 router bit so you don't have to anymore adjustments. Just make a straight edge for your router and use it on both sides. Hope this help you.
Will these bits allow me to use the Festool MFK 700 to cut 6mm deep dadoes in 19mm thick plywood? The MFK 700 has stringent size requirements - cutting length can't be greater than 5/8" and a shank length not more than 1 13/16" - 1/4" collett (or 8 mm)
Bettesue on Nov 27, 2016
Prop 65 WarningWARNING: Cancer & Reproductive Harm -

Prop 65 WarningWARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to