In stock
Cut perfectly fitted dados for a wide range of plywood thicknesses—no undersized bits required!

Rockler Perfect Fit Dado Jig

Item #
78% of 100

The conventional solution for cutting tight-fitting dados for plywood is to buy a set of expensive undersized bits, but this jig lets you do it for a wide range of thicknesses with just one ordinary 1/2'' bit! It is designed to fit into the channel of our All-In-One Low-Profile Contractor Clamps (e.g. #32777, sold separately) for ultra-straight cuts. With its unique dual-pass method, the smooth-sliding Perfect Fit Dado Jig cuts tight-fitting dadoes for stock from 5/8'' to 1'' thick, and it's infinitely adjustable within that range. It's perfect for plywood that is thinner than the nominal thickness, and for lumber that's been planed to an odd size.

Operation is simple! Once you've set your thickness with the scale, just run the first shoulder of the dado with one edge of the jig up against any straight edge, then flip the jig around and run the other shoulder. The result is a tailor-cut dado that fits like no other. Once the jig is set, you can machine all your dadoes for that thickness without having to reset the jig.

Though it can work with any straight edge, the Perfect Fit Dado Jig is designed to fit into the channel of our All-In-One Low-Profile Contractor Clamps (e.g. #32777, sold separately). This ensures that the jig does not wander from the straight edge. To buy the jig together with a 50'' All-In-One guide and Squaring Attachment see our package deal #50692 (sold separately).

  • Scale is calibrated for use with a 1/2'' straight bit
  • Any straight bit can be used, but the user will have to account for the different offset from the edge of the dado sled. This means you can use a 3/8'' straight bit for 1/2'' dados, or a 3/4'' straight bit for wider dados
  • Hooked channels interface neatly with our All-In-One Low-Profile Contractor Clamp (e.g. #32777, sold separately)
  • Capable of working with any straight edge by butting directly against the edge rather than hooking
  • Knurled knobs and laser-etched scales make it easy to adjust the offset for the second shoulder of your dado
  • Made of sturdy, low-friction ABS
  • Pre-drilled to fit most routers with a standard 3-hole pattern, and can be easily drilled to fit any router. Fits the following router models without the need to modify: Makita 1100; Milwaukee 5615-5624; DeWalt 616-618; Bosch MRC23 Series, 1617-1618; Ridgid 2930 Combo Kit; Hitachi M12VC (fixed and kit); Porter-Cable 690, 890, 7529, 97529 and 8529.
  • Includes detailed instructions
  • Made in USA
(1) Rockler Perfect Fit Dado Jig
More Information
Brand Rockler
Manufacturer Part Number No
Weight 2.4500
Tech Spec No
Tech Docs
Type Dadoes
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

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 www.P65Warnings.ca.gov/wood.
3.9 / 5.0
48 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works as advertised
Well I’m impressed, the Perfecr Fit Dado Jig works exactly as advertised. I had to drill new holes to fit my Skil 1820, but otherwise followed the provided instructions to a T, and I have dados that fit 3/4” plywood perfectly. But even better, I can repeat the set up easily. I highly recomed it.
August 7, 2018
1 month ago
Woodworking Experience:
Works as advertised
Followed the directions and got acceptable dado after a few test cuts to tweak the depth etc. Couldn't be much easier.
June 23, 2018
3 months ago
Woodworking Experience:
Great accessory for your router providing the holes lineup
You named the product perfectly because it created perfect dados. Now you should make a perfect cross cut that works with the same All-In-One Low-Profile Contractor Clamp. One negative thing would be it doesn't work with all routers because the 3 hole bolt pattern wouldn't lineup with my first router. I didn't want to drill new holes in the jig.
April 16, 2018
5 months ago
Woodworking Experience:
Confidence and Accuracy
I now feel like I can cut a dado without fear of it coming out a little tight or a little loose.
September 26, 2017
1 year ago
Woodworking Experience:
I like it. Works great
I drilled holes and attached my Dewalt DWP611 router to it. Ran a test cut and it works just as advertised. I drilled my on holes for the router and lined up the center hole on the base. The sales employees at the Rockler store on I30 in Garland stayed after hours to answer questions I had before I bought it. This Rockler store is the best. Thank you.
July 27, 2017
Woodworking Experience:
Dados the "Right way" is the "Rockler Router Fit Jig Way"
I am making a bar for my daughter which involved making many dados on fairly large panels (such as 16" x 62"). Making them on my table saw (with dado blade) and on my router table were not options because of the large panel size. I needed to lay these large panels on my layout table and use a hand held router. This jig not only allowed me to do that but the big bonus is being able to route them to the exact dimension for a perfect fit. I couldn't believe that my first practice cut was PERFECT. Thanks for helping make my project so much simpler.
April 26, 2017
1 year ago
Woodworking Experience:
Excellent for making dado joints
Works perfectly as advertised. Wish I had this years ago.
April 2, 2017
1 year ago
Woodworking Experience:
Great Product
This really simplifies making dado joints - especially in book cases. If you line up both end panels appropriately, you can make both sides of a shelf cut at the same time and they are perfectly aligned. Mush easier to use than the table saw with a dado set.
April 2, 2017
1 year ago
Woodworking Experience:
Awesome ease of use setup.
February 5, 2017
1 year ago
It worked exactly like I expected to would. It worked so well I bought each size of the straight edges.
February 4, 2017
1 year ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 21 questions Browse 21 questions and 79 answers
Why did you choose this?
Rockler Store
Make work easier.
Steven Spencer S on Aug 22, 2018
Need to make accurate straight cuts with router
David W on Aug 8, 2018
Make work easier.
Steven Spencer S on Aug 22, 2018
Already the guide so this jig should work well on many projects.
Greg B on Aug 18, 2018
Need to make accurate straight cuts with router
David W on Aug 8, 2018
Looks like a simple to use tool that will give me a perfectly straight dado cut. I already own the all-in-one clamp guide so it was a no brainer when I saw the jig in action on the youtube video.
Steven G on Jul 10, 2018
just want to try it.
George H on Jun 16, 2018
To make precise dados.
Ron W on May 27, 2018
personal use
johnny e on Apr 1, 2018
To cut dad is for shelves.
Mike on Mar 24, 2018
Building cabinets
Evan T D on Mar 19, 2018
Needed more accurate dado cuts with the router without the hassle.
WALT H on Mar 5, 2018
Wanted to try it
Michael S on Jan 9, 2018
Fits low-profile contractor clamps. Will hopefully make tight dado cuts.
Jim W on Dec 29, 2017
henry h c on Dec 13, 2017
need one
Tom B on Dec 6, 2017
Will be making cabinet that requires dados.
Michael T on Nov 29, 2017
I rout dados a lot, and I need a proven method. I will be making bookcases and knick-knack hutch.
Kenneth L on Sep 17, 2017
I am working on
Patrick F on Sep 6, 2017
Build lots of projects with European plywood this makes it possible not to have special router bits
Bob W on May 15, 2017
I looked around and this Jig seems the best of all I was able to find plus the quality assurance of the Rockler products is a plus.
Francisco P on May 10, 2017
Easy to mess up when you have to make multiple pass. Hoping this takes some of precision concerns when doing dado
eric p on Apr 8, 2017
to go with the
All-In-One Low-Profile Contractor Clamps
Dennis D H on Mar 23, 2017
To use with a router to cut dados
Rick W on Mar 15, 2017
To make dado joints and build my own cabinets
Steve P on Mar 11, 2017
RICK G on Mar 6, 2017
Accessory for straight edge
brett M on Mar 5, 2017
Simple in function and adjusting.
Ed L on Mar 3, 2017
More for straight line cuts
M W on Feb 23, 2017
i watch the demo video and seems to do the job right
curtis nas6082 c on Jan 24, 2017
Attempting to make drawer guide jig and need to
make accurate dados.
Michael G on Jan 20, 2017
I like jigs.
Guy I on Jan 2, 2017
Help with cutting dado & rabbets
Mr. G on Dec 18, 2016
to give me an alternative to cutting dados on my table saw
Stephen C H on Dec 14, 2016
Hank P on Dec 12, 2016
Accurate dado's every time
Oakley S on Nov 28, 2016
To assist with cutting long dados for my cabinet making
JASON H on Nov 25, 2016
Too improve on the quality and accuracy of my router cut dados.
MARK B on Nov 24, 2016
I purchased the all in one contractor clamps and I am very happy with them. This just makes sense
Sal I on Nov 4, 2016
Makes Dado joints easy and great fits
Melvin L on Oct 13, 2016
Great for doing long dado cuts.
Eddy W on Sep 30, 2016
sounds good
Mr Brian K M on Sep 24, 2016
Need it.
Frederick F on Sep 17, 2016
JOHN B on May 26, 2016
go with guide kit
Michael D on May 22, 2016
I would like my dado's to fit the piece exactly or as close to as I can get without too much hassle.
Robert G on Apr 20, 2016
Design project requirement
ROBERT B on Apr 15, 2016
I thought that this would be a great dado jig to use with the Rockler 4-Piece Straight Bit Set that I purchased but it didn't fit my compact Makita Router. I returned it and made my own dado jig.
Richard D on Mar 30, 2016
MICHAEL H on Mar 10, 2016
Another option for wood joinery. Good quality and affordable. Reviews were good.
Paul B on Feb 23, 2016
paired with all in one contractor clamp
Darrell K on Feb 22, 2016
I can use it.
Darryl L on Feb 5, 2016
Already the guide so this jig should work well on many projects.
Greg B on Aug 18, 2018
Looks like a simple to use tool that will give me a perfectly straight dado cut. I already own the all-in-one clamp guide so it was a no brainer when I saw the jig in action on the youtube video.
Steven G on Jul 10, 2018
Has anyone had experience modifying the Rockler Dado Jig for routers that don't fit?
A shopper on Jun 22, 2015
Does it work with all brands of routers namely ryobi routers?
Spoons on Jul 9, 2016
BEST ANSWER: I tried with a Ryobi and was never able to get it to work.
Have they fixed the issues with the jig binding up on the clamp?
Blake D on Aug 5, 2016
Are the adjustment scales and locking knobs on this jig fine enough to adjust dodo channel widths down to 1/32nd of an inch? Seems like it need veneer scale to dial in the channel width accurately.
Larry D on Jun 21, 2015
BEST ANSWER: I like the jig but I ended up "fine tuning" without the built in scale. The first time I used it I followed the instructions but the piece did not fit into the dado of it was extremely tight. In answer to your questIon, yes but no, I had to go beyond the scale marks a bit. I would recommend doing a test dado first. I may try and building some kind of jig to quickly setup the dado jig for perfect cuts. Works but can be cumbersome to me.
I have a Dewalt 611 with plunge base. What will I need to modify to get this to work? Thanks!
David N on Jan 17, 2016
BEST ANSWER: This router does not fit the jig. You would have to cut perfectly placed holes to ensure that the your router bit is centered. Better to find another jig that works with your router.
will this cut a dado in a 2 x 10?
C N on Dec 20, 2016
BEST ANSWER: I suppose it depends on which way you are cutting the dado as to how difficult it would be. If you are cross cutting, it would be easier than ripping. If your ripping it would probably be hard to do a dado in the center of the board but if it's to be off set, it may work.
Will this work with a craftsmen router?
Michael F on Aug 26, 2015
BEST ANSWER: If the Craftsman router pattern matches a standard Porter Cable base it should fit. I would paste a link to a manual that shows different hole patters but this medium will not allow me to do it. Google JessEm Rout-R-Plate manual for model 3100. Based on the information in there it appears there is a slight difference in the radius dimension even though the Craftsman router holes are 120 deg apart similar to the three hole Porter Cable pattern. Your best bet may be to build your own jig using some of Rocklers other things they offer.
Need to cut a 3/4" x 3/8" dado in MDF to install a T-track. I'm assuming I can do this in one pass or do I need to do two?
Nicholas ( on Mar 8, 2017
BEST ANSWER: You would probably want to do it in two passes with a 1/2" router bit in order to get the exact with you need for the dado. Depending on your router and the sharpness of your bit, you may want to take two pass for depth.
Is this jig compatible with the Rockler straight edge system?
AndyL on Apr 24, 2018
BEST ANSWER: I bought the jig and straight edge system and have used it’s number of times with ease, after making a few adjustments. I do recommend that you make sure the straight edge is secure. My first few attempts ended not quite so perfect, as I did not have the straight edged properly secured. After a few attempts, you should have no problems.
is it also able to be used with hardwoods?
Jim S on May 27, 2015
BEST ANSWER: My experience has been that this jig is perfectly suitable for hardwood, softwood and plywood. The key is to vary the speed of the router to suit the type of wood being routed and to move the router along at an appropriate rate so as to enable chip removal.
Does this jig work with the Rockler Straight Edge System?
Ron W on Apr 27, 2018
BEST ANSWER: Yes Enter an answer to this question.
Will the guide fit into the channel of a Woodriver guide rail? Or do I have to purchase the rockler rail also?
Roger C on Feb 25, 2016
BEST ANSWER: My guess, Roger, is that it will fit. If not, I would think that modification would be a simple matter since both guides would be similar in width, if not identical.
Will this jig work with a Trend VariJig Clamp Guide System?
Damian P on Mar 4, 2018
BEST ANSWER: Sorry Damian, not familiar with the Trend VariJig. Would recommend measuring the track slots and comparing to the Rockler system. I have seen other brands of Clamp guides with similar track designs that would appear to also work with the Rockler Dado Jig.
Will it work with a festool (or Makita) track-saw track?
Mathew W on Sep 13, 2017
BEST ANSWER: No, this is not designed for either track tool
Can you use a fluted bit and make fluted casing with this? does the sled adjust for such use?
Michael N on May 14, 2017
BEST ANSWER: I don't know if it will work with fluted bit. I have not tried. The Picture shown is open all the way open. I have only used it for slots and dados. works great for that.
Is the jig compatible with the Bora edge guide? The clamps seem to be exactly the same.
Chris k on Apr 23, 2017
BEST ANSWER: Hi Chris. I am not familiar with the Bora edge guide, but if the guide groove isn't 1/4" then it will not work properly. I was going to use my Blackjack edge guide and the groove was too big so i got the low profile contractors clamp.
All-In-One Low-Profile Contractor Clamps
All-In-One Low-Profile Contractor Clamps
What is the maximum diameter router bit that can be used with this jig?
Gregory W on Mar 19, 2017
BEST ANSWER: Measure the opening in the jig/base. I only use 1/4 -1/2" bits in mine.
Can I cut dado cuts on wood that is only 5inches by 7 inches big?
Kiley P on Nov 27, 2016
BEST ANSWER: I would say yest. I do small projects like that but I alway need to build a way to hold small pieces of wood so I can do some things and still keep my fingers attached! Lots of MDF to cut and screw together for many things. Might look into something like that especially if you are going to do the same thing over again later like small drawer sides or fronts!
Plywood shelf is .473" thick (less than 1/2"). How do I adjust dado edge using 1/4" bit?
Mike L on Jul 2, 2016
BEST ANSWER: If you are using a ½” bit as recommended, you probably can’t. I see two options. One would be to find a bit that works for the plywood size.(probably doesn’t exist considering the differing thicknesses of plywood) The other option would be to experiment with a smaller bit like a 3/8” or 7/16”. Experiment on a scrap piece before you start doing your dado to make sure of the fit.
Is this compatible with palm router (Bosch)?
MikeH on Mar 22, 2016
BEST ANSWER: My answer is no unless you modify the jig. Additional the jig requires a 1/2 inch router bit, I believe a palm router is underpowered to handle that size bit for dados.