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Leigh 16'' RTJ400 Router Table Dovetail Jig

Create a huge variety of dovetail and box joints—all while enjoying the ease and comfort of your router table.
Item #
94% of 100

Woodworkers who prefer to use their routers mounted in a table will love the Leigh RTJ400. Unlike traditional dovetail jigs, the RTJ400 slides along the top of your router table, encouraging a comfortable upright posture, and eliminating the need to balance your router on the top of a narrow jig. It provides fast, accurate routing of through dovetails, half-blind dovetails and box joints. Like other Leigh jigs, the template for the RTJ400 is precision CNC machined from aircraft grade aluminum. Perfect joint fit is guaranteed and repeatable with the patented Leigh elliptical guide bushing.

  • Lets you create 5 sizes of through dovetails, 4 sizes of half-pitch through dovetails, 3 sizes of single pass half-blind dovetails, and 4 sizes of box joints (finger joints)
  • Also capable of routing angled dovetails and end-on-end dovetails (splices), both straight and angled
  • Makes precise joinery easy—just center the board on the template and guide the jig across the router table to rout the joints
  • One template makes all three types of joinery
  • Includes clearly illustrated, step-by-step user guide and a DVD with helpful how-to videos
Notice: Operation requires a 1-3/8'' Porter-Cable style insert ring to fit the Leigh eBush to your router table or router plate.
(1) Leigh 16'' RTJ400 Router Table Dovetail Jig
(1) Nylon Stop Rod
(1) Hex Key
(1) e10 Elliptical Guide Bushing
(10) Blockers
(1) Cutting Depth Gauge
(1) Dovetail Bit – 1/2'' x 13/16'' x 8°
(1) Dovetail Bit – 1/2'' x 14°
(1) Straight Bit – 1/2'' x 1-1/4''
(1) Straight Bit – 3/8'' x 1-1/4''
(1) 76-Page Illustrated User Guide
(1) 75-Minute Instructional DVD
(1) Set of Quick Reference Instruction strips
(4) Cam-Action Speed-Clamps
(1) Adjustable Sidestop
More Information
Brand Leigh
Manufacturer Part Number RTJ400
Weight 10.4500
Tech Spec

Full-Pitch Through Dovetails:

  • Equally spaced dovetails with approx. 1-1/2''(80mm) pitch
  • 5 joint (pin) sizes: 1/4'', 5/16'', 3/8'', 7/16'' and 1/2''
  • Tails up to 1''(25mm) thick
  • Pins up to 13/16''(21mm) thick

Half-Pitch Through Dovetails:

  • Equally spaced dovetails with approx. 3/4''(40mm) pitch
  • 4 joint (pin) sizes: 1/4'', 5/16'', 3/8''and 7/16''
  • Tails up to 1''(25mm) thick
  • Pins up to 5/8''(16mm) thick

Half-Blind Dovetails:

  • Pin and tail boards routed at same time (single pass)
  • Equally spaced dovetails with approx. 3/4''(40mm) pitch
  • 3 joint sizes: 3/8'', 1/2'', 19/32''
  • Joints up to 1''(25mm) thick

Box Joints/Finger Joints:

  • Four joint sizes, 3/4'', 3/8'', 3/16'' and 3/32''
Type Dovetailing
4.7 / 5.0
14 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Very easy to use, great value.
I’ve been wanting to get a router table dovetail jig for a while. This one turned out to be very easy to use and I was able to complete the drawers I needed without any problem.
April 6, 2018
1 year ago
Woodworking Experience:
Beats my old jig
A lot easier to set up and use. Really nice clamps to hold the wood. It took me a while to wrap my head around their marking system for inside and outside settings.

Nice to stand and see the cuts from behind the saw dust. My shop vac and some duct tape keep the dust away.
User submitted image
Added Jan 26, 2018
January 26, 2018
1 year ago
Woodworking Experience:
This is an extremely well engineered dovetail jig with excellent instructions (and markings on the jig) for producing different dovetail joints. It is much more stable for making dovetail joints than the non-router table dovetail jigs.
February 19, 2017
over 2 years ago
Woodworking Experience:
So easy to use with consistent results
This jig is awesome! So easy to set up I would recommend it to anyone
January 29, 2017
over 2 years ago
Woodworking Experience:
A great router jug.
I haven't had a chance to use all its functions yet but half blind dovetails are a lot easier than on my ten-year-old standard jig. It is incredibly easy to assemble.instructins are clear and it is rugged. This is a must-have tool for any woodworker that wants to make beautiful joints.
December 29, 2016
over 2 years ago
Great tool... But warning to Bosch users.
Great concept.... Would buy again.
Can put an apprentice on building drawer boxes now without worries.
Warning... If you have Bosch router table be prepared to carve out an insert. Appears somewhere along the metric conversion way Bosch never cared about the old B&D / Porter Cable industry standard insert size.
Called Bosch about the situation. They treated me like I was from Mars.

June 1, 2016
Woodworking Experience:
RTJ400 Dovetail Jig
Well made dovetail jig with good instructions. The DVD that comes with the unit is a real joy, demonstrating how to use the jig. Comes with just about everything needed to make most dovetails, extra bits are available from Leigh. You'll need the table insert for a Porter Cable Bushing.
I would buy another if I had to do it over again.
April 26, 2016
over 3 years ago
Woodworking Experience:
very easy to use. fast to set and fast to complete a job. makes perfect dovetails
April 9, 2016
over 3 years ago
Woodworking Experience:
This is a very well built jig, and easy to use.
After a few trial and error pieces, I got it dialed in and it works great. It's also very easy to set up and quick to use. Great product .
March 17, 2016
over 3 years ago
Woodworking Experience:
truly cool
I had used the old fashioned dove tail template, and it worked, but was hard to adjust. Also, one time the bit got loose and ruined some drawers. This worked the first time. I was amazed on how accurate the adjustments could be. I only did box joints the first time, but now I am moving on to dove tails. a truly great system.
January 7, 2016
over 4 years ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 13 questions Browse 13 questions and 52 answers
Why did you choose this?
Rockler Store
Best reviews
Phil S on Nov 2, 2019
hope for accurate cut
JESSE W on May 28, 2019
Best reviews
Phil S on Nov 2, 2019
Looks good
Phillip K on Jul 8, 2019
hope for accurate cut
JESSE W on May 28, 2019
Reviews and apparent ease of use.
Steven J on Feb 9, 2019
All of the reviews were either four or five stars. All reviewers praised ease of use and thorough instructions.
Noel G on Jan 1, 2019
I chose this because I can hook it up to my router table and not to my bench. Also I do not have to take my router from the table base and use it. The router stays in it's place.
Brian D on Dec 31, 2018
This is probably the best router table dovetail jig on the market.
Joseph Musgrave S on Dec 8, 2018
Top of the line dovetail jig. Looking forward to using with new cast iron router table. Need anything woodworking related, go to Rockler.
Marv R on Dec 7, 2018
Best router table dovetail jig you can get.
Jim Lewis E on Nov 30, 2018
Reviews were good!
Mike S on Apr 12, 2018
To make cedar boxes for my granddaughters. Got good reviews and looks each to use for my shop.
Kirk W on Mar 29, 2018
Multi function and I wont need to purchase a second router
Larry M on Dec 8, 2017
To support woodworking projects.
Don A on Mar 4, 2017
it has the best reviews
Cory on Feb 15, 2017
I want to use the method of having the router mounted on the table - this does that.
Kelly B on Feb 9, 2017
Appears to be extremely useful
JOEL F on Jan 10, 2017
Rockler has always provided excellent quality and service to us. This is where my husband always goes first when looking for equipment.
Linda S on Nov 28, 2016
to complete drawers.
DONALD M on Oct 27, 2016
Looked like a real "Show Biz" way to make Dovetails.
James R L on Jul 17, 2016
It has received good product reviews and is priced reasonable.
George` R on May 9, 2016
Liked the fact that the jig is on a router table - easier to use than balancing router on a template. Also adjustments and set up look to be easier.
Mike M on May 7, 2016
video looked very good. wanted to do better job than other jigs on market
Charles W on Apr 29, 2016
Good product
Tony H on Apr 22, 2016
Quality and overall usage
DANIEL F. on Mar 30, 2016
RICHARD P on Mar 13, 2016
I really like the idea of keeping the wood flat on the table and just guiding it through, with the other types of dovetail jigs you have to make sure and not tip the router at all or you'll mess up the cut.
shannon w on Feb 24, 2016
The jig is very versatile and user friendly. I'm particularly excited about the adjustable guide bushing that will ease the tedious setup time to get a perfect tight joint. Looking forward to my first use!
Randall K on Jan 31, 2016
Good reviews
RICHARD S on Jan 27, 2016
I have the D4-24 for many years now but if I need a quick project the D4 is too big and cumbersome so I hope to use this for small projects
julius accardi on Jan 22, 2016
My husband's choice of gift
Susan N on Dec 18, 2015
Husband wanted it
Joan R on Dec 17, 2015
I wanted to cut dovetails and box joints on my router table. This jig comes highly recommended and has some videos on YouTube showing it in action. This will save me setup time with hand-held jigs and space which is critical in a small shop.
R E on Dec 16, 2015
best way to make dovetails with min set up.
John H on Sep 8, 2015
Looks good
Phillip K on Jul 8, 2019
Reviews and apparent ease of use.
Steven J on Feb 9, 2019
i have a bench dog cast iron table top and bought this jig. Is there an insert available to fit this jig?
James R on Mar 15, 2017
I just bought the rtj400 and have a craftsman router table, which insert would I need? Do you sell just router table tops that come with the correct plate. The craftsman table might be to small to use the jig with.
Robert W on Nov 10, 2016
is there an insert ring accessory for the Leigh RTJ400 that will fit a bosch RA1711 router table?
Bill B on Sep 21, 2015
BEST ANSWER: Yes there is. Contact Leigh customer service. It costs 8 bucks.
I have the rockler pro phenolic router table. Do I need the insert with the 1- 1/4"opening to use the rtj400 jig?
Sid A on Sep 28, 2015
BEST ANSWER: Yes you will need the 1-1/4" insert. Be careful what you get because there are two sizes. One in 4" and the other is 4-3/8"
where can i find a router table insert that will accept a 1/3/8 portacable bushing? I have a wood teck router table and lift.
Don Wooten on Jan 19, 2016
BEST ANSWER: I have a JessEm lift and plate which has an insert that works great for the E-Bushings used on the RTJ400. This insert is part of a 4pc insert ring accessory kit and was not included in the rings sent with the plate.
is there a vidio of the ig in action?
terry t on Aug 15, 2017
BEST ANSWER: Yes there is - it is included with the jig. I have been using the jig on a couple of box projects and it has worked very well.
what insert is needed to make this work with the Leigh RTJ400 router table dovetail jig?
David T on Sep 12, 2017
Leigh 16'' RTJ400 Router Table Dovetail Jig
Leigh 16'' RTJ400 Router Table Dovetail Jig
Incra Mast-R-Lift-II-R Designed for Rockler Tables
Incra Mast-R-Lift-II-R Designed for Rockler Tables
BEST ANSWER: You will have to purchase the INCRA MagnaLOCK Porter-Cable Guide Bushing Ring, part # MLRGUIDE, on the Incra Website.
Is there an insert for the infra mast r lift II ?
A shopper on Jul 23, 2015
BEST ANSWER: Check on the Incra website for inserts for this, I believe it is called a magna lock insert
will this work with rocklers pro lift#52429?
kelly L on Mar 10, 2019
Leigh 16'' RTJ400 Router Table Dovetail Jig
Leigh 16'' RTJ400 Router Table Dovetail Jig
Rockler Pro Lift Router Lift (8-1/4'' x 11-3/4'' plate)
Rockler Pro Lift Router Lift (8-1/4'' x 11-3/4'' plate)
BEST ANSWER: Yes, I have both items and the RTJ400 works just fine with the Rockler Pro lift. You will need to order the correct insert for the the router lift (which is sold by Rockler) so that the RTJ400 bushing will fit. When you install the new insert and bushing you will need to make a reference mark on the insert so that each time you use the Leigh bushing you will be starting at the correct position of the insert. Instructions on how to do this are given in the RTJ400 instruction book. I've use the combination of the Router lift and the RTJ400 on several drawers with very nice results.
Will this jig work with a Rockler convertible router table or is the table too small?
Stephen L on Mar 7, 2019
BEST ANSWER: wish I could help you out, but I a DEWALT router table. Good luck.
Can the Leigh 16'' RTJ400 Router Table Dovetail Jig be used with the Rockler convertible router table?
Stephen L on Mar 8, 2019
BEST ANSWER: The RTJ400 uses a special insert that must fit the router table's mounting plate. You will have to check the Rockler and Leigh's specs.
I have a Dewitt router and a separate bushing set with plates that match a Kreg table insert. Will I be able to use one of those bushings rather than obtain a Porter Cable insert ring? What is the inside and outside diameter of the bushing that comes in the box with this product?
AMS0WJ on Feb 26, 2019
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