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Special Price $9.99 Each Regular Price $12.99 Each
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Align it, clamp it, and fasten it to get perfect 90° angles every time!
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Rockler Clamp-It® Assembly Square

Item #
29190
Rating:
90% of 100
372  Reviews
Rockler Clamp-It® Assembly Square DIY Entryway Table | Darbin Orvar DIY Media Stand | Darbin Orvar Giant Air Jordan Shoe Storage Box Project | Glass Impressions Dresser Build featuring Rockler's Dovetail Jig | Patrick Hosey Rockler's Clamp-It Assembly Squares Rockler Clamp-It® Assembly Square Rockler Clamp-It® Assembly Square Rockler Clamp-It® Assembly Square Rockler Clamp-It® Assembly Square Rockler Clamp-It® Assembly Square
Rockler Clamp-It® Assembly Square
Here's a solution that's so simple, you'll wonder why it took so long to develop! The Clamp-It® replaces custom clamping jigs, acts as a third hand, and eliminates the need for long bulky clamps. Simply put, the Clamp-It® is a square you can clamp. In fact, you can even assemble a cabinet one corner at a time! Works with any joinery technique, from nails to hand cut dovetails.

It's ideal for every stage of construction, from assembling plywood cabinets to face frames and drawers. Clamp-It® is also perfect for framing decks and installing rails and balusters. Attach it to a work surface, and it becomes a right angle fixture for bench assembly. Clamp-It® is computer designed and manufactured from high impact, rigid polycarbonate to ensure strength and accuracy. Size of the Clamp-It® is 8" X 8" X 1 - 1/2".

Great for:

  • Drawer Assembly: Clamp-It® is designed for use on either the inside or outside of a corner, making it ideal for assembling drawers with lipped fronts.
  • Deck Rails: Use Clamp-It® to hold deck balusters at a perfect 90° angle while fastening.
  • Bench Jigs: Clamp-It® can be secured to any work surface to create a simple 90° assembly jig.
  • Clamp-It® Bar Clamps sold separately
(1) Clamp-It® Assembly Square
More Information
Brand Rockler
Weight 0.8000
Length 8"
Style Square
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

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4.5 / 5.0
372 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
265
58
18
19
12
90
90 is what I wanted 90 is what i got!
April 17, 2019
Purchased
 4 months ago
Rockler Assembly Square
It's always difficult to try and glue and screw several boards together at the ends of the boards. However with these squared, I simply clamp them and it keeps my project square and aligned so I can glue and screw them boards together. Fantastic.
April 10, 2019
Purchased
 1 month ago
Woodworking Experience:
Intermediate
Rockler Clamp-it Assembly square
It is like having that third or fourth hand that you so often need during assembly.
April 7, 2019
Purchased
 1 month ago
Woodworking Experience:
Intermediate
Clamp-it
This is a product I would reccomend. Its great for keeping corners square.
March 29, 2019
Purchased
 1 month ago
Woodworking Experience:
Intermediate
Haven’t used it yet but it looks good
March 26, 2019
Purchased
 1 month ago
Necessity
I love these things. I started with a pair but now we have a set of 4 in the shop. We use them all of the time. Whether it's for assembly or just for setting up pieces on the CNC or table saw, these things are great.
March 22, 2019
Purchased
 7 months ago
Woodworking Experience:
Intermediate
Sound Product. MUST often combine with Rockler's own clamp which is a good system for larger boxes!
March 15, 2019
Purchased
 2 months ago
Woodworking Experience:
Advanced
rockler clamp-it
Essential item for ease of making square corners,
March 14, 2019
Purchased
 2 months ago
Woodworking Experience:
Intermediate
Very good
I have used the clamp it squares a couple of times and I really like them. Esy and positive alignment.
March 14, 2019
Purchased
 2 months ago
Woodworking Experience:
Intermediate
Great product for cabinet assembly
Needed thes to assemble a tall wine cabinet. Kept everything nice and square!
Assembled wine cabinet
Assembled wine cabinet
March 13, 2019
Purchased
 2 months ago
Woodworking Experience:
Intermediate
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Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 59 answers
Why did you choose this?
Rockler Store
I currently own 2 of the assembly squares and the are invaluable since I always work by myself. I purchased 2 more just to make life a little easier.
Dorvan M on Apr 23, 2019
Easy to use
Doug K on Apr 20, 2019
I currently own 2 of the assembly squares and the are invaluable since I always work by myself. I purchased 2 more just to make life a little easier.
Dorvan M on Apr 23, 2019
need a third hand in my shop when trying to screw wood together
vinny v on Apr 22, 2019
Easy to use
Doug K on Apr 20, 2019
lot of cabinet work
JOHN S on Apr 19, 2019
Part of the system for assuring joints are square.
Felix J B on Apr 19, 2019
works hand in hand with the corner clamping jig.
Edward H on Apr 19, 2019
just wanted to try it. I know two pieces of wood do same thing.
Donald C on Apr 18, 2019
Model railroading module
Stephen Erickson P on Apr 16, 2019
For use with the Clamp-It Corner Jig, to make assembly work easier
Jennifer W on Apr 14, 2019
going to build some boxes this summer.
kevin b on Apr 14, 2019
clamping corners
Jim W on Apr 13, 2019
giving them a try
David S on Apr 12, 2019
to assure 90-degree corners in making aquaria (glass boxes)
Glenn S on Apr 11, 2019
I have to make cubes with 1 side open. For cubbies..these seem like they will be helpful.
Edward D on Apr 10, 2019
for building Murphy bed cabinet
Paul Z on Apr 10, 2019
The squares are great when assembling cabinets. They are like an extra set of hands. I just need more of them.
Michael on Apr 10, 2019
it works well with the corner clamping jig
Daniel S on Apr 8, 2019
Perfect 90s
Lawrence H on Apr 7, 2019
needed a secure way to clamp coners
Randy S on Apr 7, 2019
Needed some device to assist in assembling wood components having 90 degree corners.
Jimmy H on Apr 7, 2019
Should be helpful during assembly
steve w on Apr 5, 2019
Help with projects
Catherine L on Apr 3, 2019
Hope it works better then the Irwin corner clamps I have.
Tony H on Apr 2, 2019
Why not, let's see if it works better than what I've been doing all these years.
Joe D on Apr 2, 2019
to complete set of 4
Bobby H on Mar 31, 2019
Like your products.
Kenneth D J on Mar 31, 2019
I did not read carefully enough when ordering the clamp--it and needed these to make them work correctly.
Jonathan Shelton R on Mar 30, 2019
assembling a bunch of cabinets soon
Robert C on Mar 30, 2019
To use with Clamp-It corner jig
Doug on Mar 30, 2019
Easier to clamp than a traditional square
Jeff C on Mar 29, 2019
Do some cabinet work
Ken C on Mar 29, 2019
Only have two and needed more.
Michael on Mar 28, 2019
As it states, it's an extra hand.
Gary R on Mar 26, 2019
Tired of doing workarounds in my small shop making 4x8 raised beds.
C/o B on Mar 16, 2019
i won't be worry about my 90 degree angle, practicable and light weight
Johnny Matallana O on Mar 15, 2019
I need the hands free ability to assemble cabinets and other projects.
William S on Mar 13, 2019
Purchased two of them many years ago. Needed to add more for current project.
Glenn H on Mar 10, 2019
Had to give it a try. I see where a lot of people use them. Should make job much easier.
Rich on Mar 9, 2019
I need this to complete set
Victor M on Mar 9, 2019
These appear to be a good solution for squaring up some drawers I need to build.
Don G on Mar 7, 2019
Needed them in order to properly allign the pieces of a shutter that I am building.
Joe H W on Mar 5, 2019
I see the use these items have when I'm watching YouTube
Rene F on Mar 3, 2019
I was looking for something affordable that would help with minimalist furniture design. It was an easy purchase.
Nicolas A on Mar 3, 2019
saw in diy video, multiple
Connie H on Mar 2, 2019
I recieved the other part for Christmas so I wanted to complete the set.
Daryl M on Feb 28, 2019
box alignment
Mickey P on Feb 28, 2019
Square is needed to facilitate holding the corner while fastening.
Adrian E on Feb 28, 2019
To help square a cabinet during assembly
Paul D on Feb 28, 2019
To assist in making cabinets for my workshop.
William Q on Feb 27, 2019
ease of 1 person assembly
Michael F on Feb 27, 2019
need a third hand in my shop when trying to screw wood together
vinny v on Apr 22, 2019
lot of cabinet work
JOHN S on Apr 19, 2019
When should I use the Clamp-it Corner Clamping Jig vs. the Clamp-it Bar Clamps?
Jerry on Apr 28, 2017
BEST ANSWER: I work for Rockler. When the material is over 2" wide to be clamped, use the bar clamps. I fit is under the clamping jig works very well.
How many are in a package?
A shopper on Jul 29, 2015
BEST ANSWER: Just one. Clamps must be purchased also. Other clamps will work.
What are its complete mesures, 8"x8"x1.5"x?"...?
Carlos Otto C on Jun 21, 2018
BEST ANSWER: 96”
What thickness of stock will this accommodate?
Ian L on Apr 14, 2019
BEST ANSWER: You can use this with any thickness of stock as long as you have a clamp that will open wide enough to clamp to it. If you are planning on using it with the fence clamps from Rockler you are limited to about 2 inches of thickness. You can also screw this to the stock which also allows for almost any thickness. It will usually support stock that is of reasonable size. I think I have used these to support 2.x4x3/4 inch plywood panels when making a set of shelves for my shop.
Does the screw holes line up to the holes in the clamp-it corner clamping jig ?
Larry K on Jan 16, 2019
BEST ANSWER: Yes, and the jig comes with the screws you need.
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  1. Understanding Angles - Calculating Polygons
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  3. Choosing The Best Wood Clamp For Your Project
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