Special Price $9.99 Each Regular Price $14.99 Each
In stock
Rotates from 45 degrees to 315 degrees.

Rockler Adjustable Clamp-It® Assembly Square

Item #
88% of 100

There are few things more difficult than holding pieces of a project at odd angles while trying to assemble with a nail or screw. The Adjustable Clamp-It rotates from 45º to 315° and locks in place at the angles you'll need most!

  • Works with any joinery technique.
  • Easily assemble pedestal bases, staircases, decks, cabinets, drawers and more without custom clamping jigs!
  • Replaces custom clamping jigs, acts as a third hand, and eliminates the need for long clamps.
  • Measures 8" x 8" x 1-1/2".
  • Clamp it and fasten it at 90 degree and multiple angles.
  • Manufactured from high-impact, rigid polycarbonate to ensure strength and accuracy.
  • Clamp and fasten projects with odd angles or typical 4-, 6-, 8- and 12-sided frames.
  • Knob twists for tightening and loosening, while interlocking teeth securely set angle.
(1) Rockler Adjustable Clamp-It® Assembly Square
More Information
Brand Rockler
Manufacturer Part Number No
Weight 0.7500
Tech Spec No
Tech Docs
Length 8"
Style Square
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

4.4 / 5.0
78 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
great for makink angels
September 6, 2018
over 2 years ago
The most versatile tool to come along in a long time. Rockler is ahead of the curve.
August 12, 2018
2 months ago
Woodworking Experience:
Great Tool
Very good angle to use on woodworking or hobbies. Being able to adjust it makes it a much more useful tool. I also use it to clamp pieces to with other clampsl
May 25, 2018
4 months ago
Woodworking Experience:
Very Useful Tool
Just got this tool. Anticipate using this on many occasions.
February 7, 2018
8 months ago
Great tool to speed production.
Wish I had bought another. The adjustment makes it easy to lay flat in my job boxes. Perfect for moving from job to job.
September 26, 2017
1 year ago
Woodworking Experience:
Great Tool
If you want to make it square, you need to get a set of theses clamps. Easy to use and high quality.
September 1, 2017
1 year ago
Woodworking Experience:
works great
August 24, 2017
1 year ago
Woodworking Experience:
that square is great
this square is very handy, I have an old house and its not always easy to get things squared. But this makes the job a little easier
August 22, 2017
1 year ago
Woodworking Experience:
I have not had a chance to use them yet. However, they seem to be great quality as are the fixed ones I have.
August 21, 2017
1 year ago
Woodworking Experience:
Rockler adjustable square is a great addition to my tool inventory.
I like the flexibly of locking in different angles.
August 16, 2017
1 year ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions Browse 8 questions and 65 answers
Why did you choose this?
Rockler Store
Tried out this adjustable assembly square and liked it. Want to get a couple more.
Gene S on Aug 1, 2018
wanted to try them out
Michael O on Jul 30, 2018
Tried out this adjustable assembly square and liked it. Want to get a couple more.
Gene S on Aug 1, 2018
Ease of assembly.
Richard H on Jul 30, 2018
wanted to try them out
Michael O on Jul 30, 2018
To stop the guess work when setting up angle cuts
Linda H on Jul 29, 2018
Making drawers
Roger B on Jul 25, 2018
To assembly my wood projects.
Carlos Otto C on Jul 25, 2018
It looked useful and it made my order large enough to qualify for free shipping.
Gordon S on Jul 24, 2018
Rex P on Jul 22, 2018
Seems like a very acurate tool compare to what I use
Benny G on Jul 22, 2018
To set up projects faster and too make my life easier.
Steve M on Jul 22, 2018
to hold two handrail pieces to be fastened with glue and screw.
Robert R on Jul 19, 2018
wanted to try it
JOHN H on Jul 19, 2018
I will use it on a 22 1/2 degree angle.
Mike W on Jul 18, 2018
eliminates the need to make clamping fixtures
Richard T E on Jul 17, 2018
I think it would be a great versatile tool
Manny R on Jul 16, 2018
Was ging t make clamps but this will be better and faster and adjustable to boot!
Jim K on Jul 16, 2018
Seen one in action. So had to have.
Davey on Jul 15, 2018
I have a use for angles other than 90.
Scott S on Jul 12, 2018
Roger S on Jul 10, 2018
Always have need for a clamp - - especially nice that it is flexible.
Ken M on Jul 9, 2018
Because it's a genius idea.
Robert W on Jul 8, 2018
See if it helps odd angle glue ups
Michael K on Jul 7, 2018
already have one - thought 2 would be good decision.
Jim C on Jun 22, 2018
Choose this because it's adjustable
Chan W on Apr 28, 2018
To use with non-90* projects
Jeremy H on Mar 14, 2018
Cabinets and flag boxes
Michael M on Feb 22, 2018
JERRY E on Feb 21, 2018
The reliability and ease of a clamp-it square, but this one can do multiple angles? OK! Sign me up.
Steven K on Feb 11, 2018
to build garage cabinets
Anthony A on Feb 8, 2018
They will be very helpful in building kitchen cabinets and other projects...heard very good reviews on this product !!
MARK M on Dec 26, 2017
I need a second set of hands for angles, hoping this will help.
digbee on Dec 19, 2017
Needed for multiple angles
Roy B on Dec 10, 2017
to help hold wood to be joined in place while connecting it. I like that it adjusts to different angles.
Joyce E on Oct 31, 2017
I thought these adjustable units were part of the clamp it kit I bought earlier. I must of Miss read the description of the kit
Evan Rowe on Oct 4, 2017
I make more that one angle should help hold things together.
Donnie R on Sep 27, 2017
Watched your Video.
Townsendsr on Aug 10, 2017
More versatile than just 90 degrees Clamp-It.
Dennis on Aug 10, 2017
Video demo and other positive reviews
Alex (DIY/Maker) on Aug 3, 2017
I'm building a cabinet and I need help making it square.
Bryan D on Aug 2, 2017
I have a project coming up shortly that I need to clamp 4 - 90 degree corners at once. I really like the fact that you can change the angle on each clamp.
Wayne W on Aug 2, 2017
can use many ways
John H on Aug 1, 2017
RICHARD A on Jul 31, 2017
Already have one, but really need more than one to do a proper glue up.
ALL B on Jul 27, 2017
I struggle with angles
Susan G on Jul 27, 2017
Get product for furniture assembly.
David B on Jul 26, 2017
To help with odd corners
William W on Jul 22, 2017
to secure angled deck members for attachment
John D on Jul 22, 2017
Simple solution to a common issue.
Richard L on Jul 22, 2017
Something I have always needed and the ones I quickly made wore out.
John Erick B on Jul 19, 2017
ordered 2 of the fixed right angle and liked them
richard v on Jul 18, 2017
Ease of assembly.
Richard H on Jul 30, 2018
To stop the guess work when setting up angle cuts
Linda H on Jul 29, 2018
Can these adjustable Clamp its, be used with and attached to the Clamp-it corner clamping jig!?
Mark W on Aug 7, 2016
Does it come with the two clamps as depicted in the photo ?
Ralph on Jun 18, 2015

We also bought non-adjustable squares that had clamps included. However the adjustable one did not have clamps included. Note that any clamps of appropriate size will work. Hope this helps you.

Is there an angle guage on this so i can set a specific angle?
Byron K on Nov 8, 2015
BEST ANSWER: Yes. It's embossed labels allow you to identify and select any angle from 45 to 180 degrees. The rotating joint is also notched to help you predictably lock your preferred angle in 1 degree increments.
As you adjust it, will it have a notch to indicate that you reached 90 and/or 45 degrees?
Carlos Otto C on Jun 15, 2018
BEST ANSWER: Yes, and it has lines marked with angle degrees that align with a mark
Will the f style clamps work with these?
Justin B on Mar 8, 2017
BEST ANSWER: Yes, with these cautions.
Be sure that the throat depth of the clamp is sufficient to position the adjustable assembly square to allow fastening. And be sure that the bar length of the clamp will accommodate the combined thicknesses of the assembly square and the material being fastened.
Can't figure out what Clamp-It square to order for putting drawers back togeter?
Robert L on Nov 30, 2015
BEST ANSWER: I didn't remember that there were multiple sizes, but whichever will fit will work great. The last project I did with mine was to build an octagonal frame. It turned out great. I've used mine both inside a frame and outside a frame.

Can I set 22.5 degrees on this clamp?
JCap571 on Jun 25, 2018
BEST ANSWER: No, the smallest setting is 45 degrees
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