Store Locator

Get Expert Advice

Return Policy

Rockler Perfect Fit Dado Jig

Cut perfectly fitted dados for a wide range of plywood thicknesses—no undersized bits required!
Item #
80% 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
Weight 2.4500
Type Dadoes
4.0 / 5.0
72 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Jig Works as expected.
Very easy to mount router. Very accurate and consistent. Would definitely recommend to others.
May 23, 2020
1 month ago
Woodworking Experience:
Amazingly simple and effective
I was skeptical to be honest. Followed the instructions and presto..... perfect dado! Makes an ok wood worker look like a pro! Highly recommend this product.
My first built in- picture of a dado shelf. Amazingly simple!!!!
My first built in- picture of a dado shelf. Amazingly simple!!!!
April 6, 2020
2 months ago
Woodworking Experience:
Worked like a charm.
Easy to set up and use. I used it to cut 1/4 wide dados.
March 7, 2020
3 months ago
Woodworking Experience:
This works perfect. very easy to use
December 26, 2019
5 months ago
Good solid
Works very well. Love it
September 30, 2019
8 months ago
Woodworking Experience:
Works as stated
Just used this for the first time and once I set it up, it worked perfectly! Will be using this a lot in the future, takes all the hassle out of creating dados.
July 23, 2019
1 year ago
Woodworking Experience:
Great help when building cabinets.
Very handy if you use a lot of dado joinery in cabinet building. You can work with large pieces, even full sheets, from anywhere you can find room to lay the sheet down. I knew the 3-hole pattern is the correct one for the Bosch and Hitachi routers, and I attached the sled to a Hitachi M12VC router, which is priced very competitively. It has a strong motor and works very well as a dedicated router for the sled, without setting you back much, and without having to drill the sled base.
July 6, 2019
1 year ago
Woodworking Experience:
Perfect Dado with Makita XTR01Z / RT0701 Plunge Base
I am a newbie weekend woodwork warrior, only started about 9 months ago. I first purchased this item 6months ago and found out after I got (the hassle to get it shipped to Singapore is another story!) unit that the holes did not fit my Makita plunge base. This weekend just go, I managed to get to work and I will explain how I did it!

First get hold of Bosch Center cone, this thing is amazing and I would not have been able to correctly line up the base and drilled the holes without it.

Attached the cone to the router by dropping it down through the Perfect Dado first then on to router and then raise the router till the cone forces the base to be centered with the router. Next I flipped it over and used some squares block to stand the router with the cone not touching the surface you layyed it on. I then slowly positioned the router til it was perfectly aligned with the Rockler Dado board, I confirmed with is a Irwin Combination square and then measured along the router till it was all the same distant.

Once aligned, instead of marked the board, I used 3M masking tape and taped the edged completed with multiple layers, the Makita plunge plastic base just slotted in perfectly then I used a centering drill bit to mark the two holes.

Finally, I drilled the two holes using my $30 drill press to drill the holes perpendicular and it was complete. I used extra long screws as the base is quite thick, this ensures when it's screwed the router is securely fixed and only needing two screws instead of the 4 in the base, I didn't drill 4 holes as in the pictures the base predrilled holes are not perfectly aligned so I couldn't use it. But as you can see from my final picture the 1/2" dado cut was a first time run! If you look closely it is super close to the 3 1/2" distance as mentioned in the documentation so I am super happy with the result.
3 1/2" from the edge of the guide as per the Rocker Instruction.
Underside of the base with the two drilled holes
Dropped the plastic base cover onto the masked area and finally masked it over to prevent movement
Masked the entire edge of the plunge base to create an perfect fire for the cover.
First insert Bosch center cone and then center the board.
June 10, 2019
1 year ago
Woodworking Experience:
Great product. I love ROCKLER products. Its a pity we cant get some of your products here in the UK. I had to send to the USA to get this and the Postage cost was as much as the dado jig itself.
May 19, 2019
1 year ago
Great jig
Works very well. I used it to make dados for an oak Murphy door I am building. Good quality product and easy to use.
December 27, 2018
1 year ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 28 questions Browse 28 questions and 87 answers
Why did you choose this?
Rockler Store
Appears to be a great product,and I prefer using my router to make dadoes.
Morris M on May 15, 2020
I already had the sheet clamp and this perfectly complements for router dado's.
William H on Feb 22, 2020
Appears to be a great product,and I prefer using my router to make dadoes.
Morris M on May 15, 2020
It will help with making accurate dados for shelving units.
James M on Apr 21, 2020
I already had the sheet clamp and this perfectly complements for router dado's.
William H on Feb 22, 2020
A Christmas gift to myself. It will complete my clamp track system. Looking forward to my first use of this jig.
Looks simple to setup yet still make precise dado cuts. Also, since I already have the router and the AIO low profile clamp, it’s the last piece I need to complete the set. <br />Plus, what better time to get a Secret Santa gift for myself.
Angel G on Dec 20, 2019
Son in-law Christmas gift!
Cindy B on Dec 5, 2019
boyfriend circled item in your catalog
nancy w on Dec 4, 2019
I need it
Petr L on Oct 27, 2019
Easy way to set up and cut Dado's quick and accurately
Kenneth Dewayne D on Sep 30, 2019
Looks like it will make doing dado easier
Dudley4166 on Sep 9, 2019
just what I needed for my current project. And I have always been satisfied with your gear.
James on Aug 4, 2019
James D on Jul 29, 2019
To cut out the guesswork associated with plywood sizes and standard bit sizes.
Samuel M on Jul 22, 2019
makes control of router easy
Louise H on Jun 9, 2019
Watched YouTube video and looks like it will help me with dados.
Craig A on May 14, 2019
Judy F on Apr 12, 2019
A simpler easier way to cut dados and more accurate.
John H. F on Feb 24, 2019
This looks like what I want. I'll give this Dado Jig a try to see if it meets my needs and expectations. This is my first Rockler purchase. As such, my future business with Rockler depends on the quality and functionality of this product.
Gary J on Feb 20, 2019
Designed to work with their low-profile clamp
Jesse L on Feb 17, 2019
Need it
William W on Feb 14, 2019
Need it
Lloyd B on Feb 7, 2019
My home made Jig doesn't work nearly as well. Along with the clamping straight edge, I can cut the two sides and back of my cabinet, for shelves, all at the same time.
Rick H on Jan 31, 2019
I need a way to cut accurate dadoes in large stock
Lee P on Jan 12, 2019
easier than building one
Robert H on Jan 9, 2019
My brother wanted it for Christmas
Julie C on Dec 4, 2018
simple dado's
John T D on Nov 7, 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 <br />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
It will help with making accurate dados for shelving units.
James M on Apr 21, 2020
A Christmas gift to myself. It will complete my clamp track system. Looking forward to my first use of this jig.
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
Have they fixed the issues with the jig binding up on the clamp?
Blake D on Aug 5, 2016
BEST ANSWER: I had no issues of binding at all. Make sure it’s clean and away you go..... smooth.
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.
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.
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 fit a DEWALT Router Fixed/Plunge Base Kit, Variable Speed, 12-Amp, 2-1/4-HP (DW618PK)? TIA
Barbara C on Sep 1, 2019
BEST ANSWER: Barbara C: I can't answer that question as I us a Ryobi router and have not used the DEWALT. Sorry.
Will this work with the rocker plywood router bits that are already correctly sized for plywood thicknesses?
DanB360 on Nov 6, 2018
BEST ANSWER: Yes it will work with these bits - there will be no need to make adjustments or second passes with smaller bits.
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.
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!
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.
is the purfect fit dado jig available in the uk? who from?
richard m on Feb 3, 2020
BEST ANSWER: Amazon UK has Rockler product on their web site. Although I'm not sure if the Dado jig is stocked.
Will this jig fit a Porter Cable 690 or 892 router?
Bradford T on Nov 10, 2019
BEST ANSWER: Yes it will.
can it be used to put a dado in a narrow three inch wide twenty inch long board ?
Ron c on Feb 24, 2019
BEST ANSWER: Have not used on a piece that narrow. Doubtful, any way I wouldn't try it unless attached to a wider board so the clamp could be used. Use a router table if you have one.
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.
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.
is metric measurements available in this product?
Francois B on Oct 14, 2019
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