Special Price $31.78 Kit Regular Price $42.98 Kit
In stock
Holds panels at a right angle, freeing up your hands to drive fasteners—includes a Clamp-It so you can start building right away!

Clamp-It® Corner Clamping Jig with Clamp-It® Assembly Square

Item #
76% of 100

Struggling to line up cabinet parts while driving fasteners can be frustrating, and if you're using a nail gun, downright dangerous. The Rockler Clamp-It® Corner Clamping Jig eliminates that frustration by providing another set of ''hands'' to hold your parts together. It's used with the enormously popular Clamp-It® (included in this package) to hold panels at a precise right angle for fastening. Used in sets of four, the jigs are supportive enough to hold an entire case assembly as it is being assembled. The clamps have soft pads to prevent workpiece marring. Mounting holes in the jig allow for attachment to your work surface.


  • Extra-wide base, high walls and strong Acme threaded clamp screw hold panels securely
  • Thick cushioned pads to prevent marring
  • Durable glass-filled polycarbonate construction
  • Mounting holes allow for attachment to work surface for creating assembly jigs
  • Jig holds panels exactly 3/4'' off the work surface so you can use scrap boards to support other corners if using only one jig at a time
(1) Rockler Clamp-It® Corner Clamping Jig
(2) 1'' Screws for Attaching Clamp-It
(1) Clamp-It® Assembly Square
More Information
Brand No
Manufacturer Part Number No
Weight 2.3000
Tech Spec
  • Material: Glass-filled polycarbonate
  • Max Panel Thickness: 1''
  • Dimensions of Clamp-It Only: 8'' X 8'' X 1 - 1/2''
Tech Docs No
Capacity No
Grip Style No
Jaw Depth No
Clamp Pressure No
Type No
Jaw Width No
Length No
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

3.8 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
rockler clamp-it corner clamping jig
great gadget !! . It's my third hand.
June 23, 2018
3 months ago
Woodworking Experience:
Best solution on the market
Great product, so far this is the only solution that I have seen of its kind. I only have 2 of them.. I need 2 more. Works great for lining up plywood for pocket hole screws.. don’t drop off workbench like this other guy. It’s not the products fault it’s your shop floor
May 25, 2018
Woodworking Experience:
with this order I now 4 of the Clamp-it and the wor very well
June 20, 2018
3 months ago
The clamp it jig itself is handy. However, the squares are obviously for carpentry, not woodworking. The difference between a carpenter and a woodworker is 1", so the squares fit the bill for carpentry. No where near a precise 90° angle. I kept the jig and made my own squares with some scrap oak. This pretty much defeated the purpose in buying the jig to begin with (to save time fiddling around making jigs, instead of building revenue). So, I would only recommend buying the clamping portion if you're ok with spending time to make the squares for them, otherwise pass.
June 17, 2018
3 months ago
Woodworking Experience:
Caution knob breaks easily
4 of these clamps (with the clamping jig). I have one that was bumped off my assembly table which ended up breaking the knob. The knob is very weak plastic, especially in the middle portion of the knob (seems the material is fairly thin at at point). I inquired about a replacement knob and was told there isn’t any due to the nature of how they assemble this jig and knob.

So if you break a knob this could become a $40 piece of plastic sitting in your shop.

I was able to make my own “fix” to the knob. I had to cut off the hub of what was left of the plastic knob to expose the threads. I then created a wooden knob with a 7/16 hole. Placed a bit of epoxy on the threads and twisted on the wooden knob (takes some force since 7/16 is just a bit undersized for the threads). Seems to be a workable fix.

Is disappointing that the knobs are easily broken and that it was not engineered to be replaceable.

Love the concept and the use of the tool — but not so much the execution of the design.
February 27, 2018
Woodworking Experience:
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Browse 4 questions Browse 4 questions and 15 answers
Why did you choose this?
Rockler Store
I have one set and liked it and with this price, couldn't pass up the chance to get another set.
Rosa R on May 31, 2018
Building a cabinet
Roland H on May 30, 2018
I have one set and liked it and with this price, couldn't pass up the chance to get another set.
Rosa R on May 31, 2018
I am completing a set of 4.
Fred L on May 31, 2018
Building a cabinet
Roland H on May 30, 2018
Good tool / Discounted Price
Carlos L on May 30, 2018
Looks to be real handy
DALE E on May 29, 2018
Needed for a project
Jeff G on May 28, 2018
Agree with another reviewer that the knobs are susceptible breaking, however, these items are an excellent addition to a shop for those who build an occasional cabinet, or several. Had 2, just bought 2 more. Speeds up the cabinet building process
Martin H on May 27, 2018
I have wanted these since I first saw them but considered them too expensive at the time. This is a good price for these.
ROGER M on May 26, 2018
to help me make better corners.
Neal W on May 26, 2018
Hopes of making square corners easier to match and drill.
Patrick G on May 26, 2018
it makes cabinets easier to assemble
Daniel G on Mar 1, 2018
This jig & assembly square is really going to help when putting together cabinets and drawers. I plan on ordering more in the near future.
Terry P on Feb 22, 2018
Have had good experience with the Assembly Squares - this looks like an improvement for clamping them.
Mike U on Feb 16, 2018
Looks like will make my job easier and hope quality is worth the price.
Jeffrey L on Feb 3, 2018
We bought one "in store" and loved it. Needed more for the shop.
Jan E on Nov 27, 2017
I am completing a set of 4.
Fred L on May 31, 2018
Good tool / Discounted Price
Carlos L on May 30, 2018
how wide can the wood be that it clamps ? can it hold 1 1/2' face frames for making cabinets ?
rich h on Dec 14, 2017
Do you have to buy 4 clamps or does it come with 4 clamps?
Lillian V on May 30, 2018
I have 4 of the older clamps as in the photo. Will they fit in this clamp jig holder?
Walter G on May 30, 2018
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