Special Price $7.79 Each Regular Price $12.99 Each
In stock
Align it, clamp it, and fasten it to get perfect 90° angles every time!

Rockler Clamp-It® Assembly Square

Item #
90% of 100
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
Manufacturer Part Number N/A
Weight 0.8000
Tech Spec N/A
Tech Docs N/A
Length 8"
Style Square
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

4.5 / 5.0
315 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great with KREG fasteners. Keeps everything square.
September 25, 2018
3 weeks ago
Woodworking Experience:
works great with my clamps. helps get the boards square.
September 24, 2018
1 year ago
Woodworking Experience:
Left or Right, it's still 90 degrees
I purchased 4 of these while on sale, took them home and saw that I need a lot more for big projects for those days I am working alone. They are a solid piece that keeps the boards from moving with other clamps, perfect for glue work or using pocket screws.
September 19, 2018
3 weeks ago
Woodworking Experience:
I wish I had bought 4 of them. I'd also like to see them twice as wide.
September 5, 2018
1 month ago
Woodworking Experience:
Holds the board in place to fasten
Just great. Neat idea. Wish I would have thought of this.
September 4, 2018
1 month ago
Woodworking Experience:
Great product
Works great helps with getting things all squared up
August 28, 2018
1 year ago
Woodworking Experience:
Gets the job done,,,durable,,,,easy to use
August 25, 2018
over 2 years ago
Woodworking Experience:
One of my favorite tools
I love these! Super strong. Although the clamps that they sell for these usually don't work for me because they don't open wide enough, I can to use other clamps that I have and they work just fine. I was able to use these to hold everything together while I was designing and making my work station. The legs, supports, work top and shelf were kept in place and perfectly square while I was dry fitting, drilling and bolting it all together. Without these, there is no way I can build such things by myself. They are my extra hands and best thing of all, they don't complain when I need their help :)
July 30, 2018
1 year ago
Woodworking Experience:
Cabinet drawers
Was able to get the job done better. Especially on the drawers for a cabinet I made. Made connections a lot easier to hold together for final touch ups.
July 13, 2018
3 months ago
Woodworking Experience:
Great for shelves and corners
Sturdy and well made
July 6, 2018
3 months ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 56 answers
Why did you choose this?
Rockler Store
beginning to build projects for year end
Tom S on Sep 24, 2018
For those need a 3rd or 4th hand situations
David V on Sep 19, 2018
beginning to build projects for year end
Tom S on Sep 24, 2018
Friend uses the clamps
Tim T on Sep 20, 2018
For those need a 3rd or 4th hand situations
David V on Sep 19, 2018
On sale price
Robert J on Sep 15, 2018
great tool for joining
sheri lewis V on Sep 14, 2018
reasonably priced
Steven R on Sep 12, 2018
DAVID CHEVERIER O on Sep 10, 2018
Who doesn't need consistent 90 fixture?
Kevin Zipperian Z on Sep 10, 2018
I had 2 and they work great, so I wanted 2 more.
Peter O on Sep 9, 2018
Handy tool!
Ron F on Sep 7, 2018
I want to be able to keep work pieces square to each other, and don't trust the accuracy of my tools enough to try to make assembly squares myself.
Steven W on Sep 5, 2018
price and very helpful in keeping boards square when when screwing them.
Jose G on Sep 3, 2018
need them
Paul L on Sep 1, 2018
Building a Farmhouse style bed with built in drawers need an easier method of ensuring square corners during assembly.
Scott M on Aug 20, 2018
Frame assembly
Earl T on Aug 15, 2018
A great tool, very accurate and rigid.
Stanley B on Aug 14, 2018
I am building some boxes,this will help
Peter K on Aug 14, 2018
I need a simple way to join pieces of oak into a picture frame. This item has great reviews and a good price point.
Bill M on Jul 31, 2018
Building cabinets, alignment of panels when a Kreg jig
WARREN B on Jul 16, 2018
already have 4 of these and needed more.
Richard R on Jul 9, 2018
add to my woodworking inventory
Harry S on Jul 8, 2018
works good
ensin w on Jul 5, 2018
I'm looking for a faster, easier way to fit together cabinet sides.
Richard M on Jun 28, 2018
adding to clamp it assembly squares already have while on sale
Joe on Jun 23, 2018
Always wanted to try, and was on sale.
Gary B on Jun 20, 2018
I have one and I wanted a second. I plan on getting 4 over the next year or so.
reddor55 on Jun 17, 2018
clamping square corners
Marianne A on Jun 15, 2018
I have one, use it all the time, wish I had ordered 2 to begin with. So Handy!
Julie C on Jun 4, 2018
didn't have this
Charliecr3 on Jun 2, 2018
Always wanted some of these to make assembly time easier.
Bonnie B on Jun 2, 2018
These will work great with my quick-grip clamps which I prefer over corner clamps.
Ed H on May 31, 2018
For easy assembly of square parts, and the great sale price
Joe S on May 30, 2018
i have 4 of these clamps and found out i needed more on my last build
MIKE R on May 28, 2018
going to try them out to see if they work as good as people say.
pat b on May 27, 2018
Making cabinets,
Donald K on May 27, 2018
It was what I needed to put some shelving together.
George P on May 27, 2018
I now have 4
Charles J on May 26, 2018
Very impressed with previous purchase.
Well earned reputation for quality.
Marc M on May 3, 2018
By accident, this was a "big thumb" mistake
dan r on May 2, 2018
seems handy
Julie C on Apr 26, 2018
Assists in assembling cabinets
Gregory D on Apr 25, 2018
Assemble stuff
John B on Apr 20, 2018
Good tool for assembly work, reasonable quality & needed sale price to help with cost
Robert R on Apr 19, 2018
I've ordered these before. These are a gift.
Alan B on Apr 18, 2018
I already have one and thought it would help to add another.
FRANK R on Apr 16, 2018
to aid in assemble of face frames
Ronald G on Apr 16, 2018
I have 2; 2 more will make it easier to assemble square picture frames.
Keith B on Apr 14, 2018
to help keep the frame square
Ronald G on Apr 14, 2018
Great reviews.
Hong C on Apr 13, 2018
Perfect square corners
David A on Apr 11, 2018
Friend uses the clamps
Tim T on Sep 20, 2018
On sale price
Robert J on Sep 15, 2018
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
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