$29.99 Each
In stock
Firmly holds panels at a precise right angle, freeing up your hands so you can drive fasteners.
  • Buy 4 for $26.99 each and save 10%

Rockler Clamp-It® Corner Clamping Jig

Item #
90% of 100

Struggling to hold cabinet parts in alignment while driving fasteners can be an exercise in frustration, 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® (#29190, sold separately) 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
  • Drilling of 3/8" holes may be required in older Clamp-Its for use with this product.
(1) Rockler Clamp-It® Corner Clamping Jig
(2) 1'' Screws for Attaching Clamp-It (#29190 not included)
More Information
Brand Rockler
Weight 1.5000
Tech Spec
  • Material: Glass-filled polycarbonate
  • Max Panel Thickness: 1''
Technical Documents Adapting the Rockler Clamp-It® Corner Clamping Jig Guide
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

4.5 / 5.0
258 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Tight corners
I am always at a loss over how to get two pieces of wood to line up and stay tight while I attach them together. Rockler Clamp-it corner answered that problem. Kept both sides upright and tight against each other as I added pocket screw holes and pocket screws.
August 22, 2019
3 weeks ago
Woodworking Experience:
This goes with the Clamp-it corner jig to make excellent corners
Get a couple of these and a couple of the clamp-it ninety degree blocks and your corner making problems are over. I got my clamps yesterday. I tried them out today. I was able to make a box with perfect ninety degree corners in a matter of minutes.
August 21, 2019
3 days ago
Woodworking Experience:
Great product.
August 18, 2019
1 month ago
Great product for a good price!
August 6, 2019
1 month ago
Woodworking Experience:
great tool
used it and works great. would recommend to anybody doing boxes
August 6, 2019
1 month ago
Great Product
These corner clamps work great for putting cabinet boxes and drawers together.
July 19, 2019
1 month ago
Woodworking Experience:
I recommend this for any project.
Great product. Handy
July 11, 2019
2 months ago
Woodworking Experience:
Another Solid Rockler Product
I build a lot of base cabinets and tool stands, so having a product that can assist with holding everything square is a big help. The Clamp-it Corner Clamping Jig will do exactly that, freeing up your hands to actually screen/affix everything together. If it's in the budget, opt for 4 of these clamps.
July 9, 2019
2 months ago
Woodworking Experience:
Very happy
Very happy with it. Very useful. I've used it on several projects already
July 3, 2019
2 months ago
Works great
July 2, 2019
2 months ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 18 questions Browse 18 questions and 42 answers
Why did you choose this?
Rockler Store
use with Clamp-it
Sam ( on Aug 18, 2019
Wanting something to help make corners more square
J.R. N on Jul 5, 2019
use with Clamp-it
Sam ( on Aug 18, 2019
I'm 71 yrs old some time I need help holding boards it look like these will help me.
Ronald P on Aug 16, 2019
Wanting something to help make corners more square
J.R. N on Jul 5, 2019
I wanted to add this to my clamping accessories.
Kimberly C on Jul 1, 2019
Great design and works like a charm.
Joseph L on Jul 1, 2019
Does what I need it to do.
PAUL C E on Jun 28, 2019
I have the other pieces I just needed the clamp part.
Walter R on Jun 28, 2019
I work alone
Deb C on Jun 26, 2019
Seems like the best jig for making square cabinets.
Dennis K on Jun 24, 2019
Great item
Mark J on Jun 19, 2019
Excellent method holding aggravating corners
Gary on Jun 16, 2019
It is my third hand
Francis P on Jun 16, 2019
Have one and like it
James M on Jun 14, 2019
building cabinets
Oscar R on Jun 14, 2019
Much easier box construction
Richard S on Jun 11, 2019
making kitchen cabinets
Timothy F on Jun 9, 2019
Building Cabinets
William H on Jun 4, 2019
building cabinets
Don K on Jun 3, 2019
I already have two and I needed two more.
Brian C on Jun 2, 2019
it's to make dresser draws.
Philip H on Jun 2, 2019
To supplement my Clamp-It brackets
Robert P on Jun 2, 2019
for cabinet making
Charles W. W on Jun 2, 2019
I"m building cabinets and I only have two hands.
Frank K on May 25, 2019
I bought two of these a time ago and they work great. By having 4 of them work will go. lot faster. If yo build lots of boxes or cases you need to get four of these.
D O on May 22, 2019
Other Rockler jigs have been great!
Seth I on May 22, 2019
to help with assembly
Michael F on May 20, 2019
A convenient and quick way to support the project I am building. it is an extra pair of hands.
Cornelius W on May 15, 2019
Need extra hands!
Jose Haro O on May 14, 2019
Perfect item for a box project I am involved in
MIKE P on May 12, 2019
I work alone this will be an extra set of hands or two
Rodney M on May 10, 2019
I want to see if it helps me
Michael R on May 5, 2019
It looks like just the thing to handle my corner issues.
eman on May 5, 2019
I think it will help with quality of my product and its looks efficient to use
Tom K on May 3, 2019
Need all the help I can get to make right angles.
Andrea S on May 2, 2019
Versatility and ease of use.
W I on Apr 29, 2019
Looks useful as advertised
Jason p on Apr 28, 2019
Wanted something to hold case parts better than blocks of wood.
John T on Apr 28, 2019
third or fourth hand it seems.
John C on Apr 25, 2019
I always work by myself and rig up jigs to hold the items i am building. This jig will make it much 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
Customer reviews
Barbara B on Apr 21, 2019
lot of cabinet work
JOHN S on Apr 19, 2019
This item will help me make sure the corner joints are flush.
Felix J B on Apr 19, 2019
Needed an accurate way to hold parts during the assembly process.
Edward H on Apr 19, 2019
Needed for safer and quicker assembly of boxes
John G on Apr 15, 2019
Needed an extra set of hands for assembly work
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
To clamp things
John K on Apr 12, 2019
I need a 3rd hand
alphinjh on Apr 11, 2019
I'm 71 yrs old some time I need help holding boards it look like these will help me.
Ronald P on Aug 16, 2019
I wanted to add this to my clamping accessories.
Kimberly C on Jul 1, 2019
Would it be ideal to have 4 of these while building cabinets or only having two will do just fine?
Trevor O on Sep 15, 2015
BEST ANSWER: If you are building larger cabinets, four might come in very handy
Can item 69954 be used with this item? I ordered 2 of these plus item 69954. Kinda ridiculous this item doesn't include the black plastic squares are ready
Trevor O on Sep 15, 2015
BEST ANSWER: Yes 69954 can be used with this product
What size Replacement Knob to I need for this item?
Bill R on Mar 7, 2016
BEST ANSWER: When you received this item, there should have been an instruction manual with it. The manual should have a list of replacement parts. If not, simply call Rocklet Tech Support and they can send you the part you need. They can also supply you with replacement parts lists.
Can the Rockler Adjustable Clamp-It Assembly Square (Item #33586) be used with this? Or just the fixed 90º Assembly Square?
Lane B on May 7, 2016
BEST ANSWER: This was designed for the fixed Clamp-it
Will the 58918 hold 3/4 inch plywood plus the 29190?
Thomas C on Sep 3, 2015
BEST ANSWER: Yes, it will hold up to 1" plywood plus the Rockler Clamp-It® Assembly Square (Item #: 29190)
¿Can this work with the Mini Clamp-it item (27767)?
Carlos Otto C on Feb 14, 2019
Rockler Clamp-It® Corner Clamping Jig
Rockler Clamp-It® Corner Clamping Jig
Rockler Mini Clamp-It® Assembly Square
Rockler Mini Clamp-It® Assembly Square
Are there any similar products that would work for assembling carcasses built from 2x4's?
mcilroy50 on Jan 22, 2016
BEST ANSWER: You can build your own narrower versions of the 29190 square add-on to clamp thicker materials if you need a higher lip on the backside. Otherwise you can go up to just shy of 3 inches without the 29190 square inserts. With the 29190's in place the maximum width is just shy of 1 inch. Not sure why Lyman L said small wood. So the answer is maybe, it you are talking about the 1.5" dimensional side of the 2x4, but not the 3.5" dimensional side.
What would be the smallest box you could make before the clamps would bump into each other? I'm thinking it would be around 18"?
groundhog on Feb 18, 2016
BEST ANSWER: Looks like about 8" X10.25" insde clearence. These clamps are excellent for aligning larger pieces that are to assembled with screws but are not good for asembling mitered boxes which require pressure from both directions. With that said very helpful in assebling cabinets etc.
Will this work with your mini squares?
Dapper Dan on Nov 28, 2018
BEST ANSWER: I used the squares I already owned. Worked like a champ.
Would I be able to use these with Woodpecker brand clamping squares? It would make setup time much faster than using separate clamps.
Ted K on Oct 17, 2016
BEST ANSWER: I bought two of these clamps and they have been a great help in many different projects. They certainly made the job much easier. They are easy to use.
I often build large wooden boxes with box joints. Will these work well to glue them square? Thanks!
carl c on Oct 5, 2015
BEST ANSWER: Hi Carl. These clamp-it jigs are very heavy duty and work great. You must also purchase the clamp-it square (below) to go with each jig. You need at least 2 of each to be effective. I purchased 4 of each to give more versitality. They are very pricey and I regretted purchasing them at first because of that, but they have proven to be very helpful when aligning large projects. I also purchased 2 sets of the mini clamp-it assembly sets.
Rockler Clamp-It® Assembly Square
Rockler Clamp-It® Assembly Square
Would these work with Kreg pocket hole assembly?
Ted K on Oct 28, 2015
BEST ANSWER: They work really great. It is like having an extra set of hands. Highly recommended for any shop!
What is the maximum thickness of wood it works with?
Joseph D on Oct 28, 2018
BEST ANSWER: Up to an inch. Works really great on 3/4 inch just like they say. A second pair of hands. I have 4 units. Great tool.
The material I need to clamp is 1 1/8" thick. What max. thickness does this accommodate?
John A H on Apr 3, 2019
BEST ANSWER: it's meant for 3/4" material and looks like it would take 7/8" thick but you could make your own clamp-it assembly square and make it slightly smaller and then your material thickness would probably work.
¿Can this hold thick panels accurately without use the 29190 item?
Carlos Otto C on Feb 14, 2019
BEST ANSWER: I suggest using the #29190 or the new 1/2'' Rockler Clamp-It Clips, 4-Pack #58225 or 3/4” #58849. They will make your life a lot easier when building cabinets.
Under the heading of "what's included", it states 1inch screws to attach Clamp-it (28120 screws not included). Are they included or not included?
George E on Jan 19, 2016
BEST ANSWER: The screws are included.
Part number 28120 does not appear to exist.
Part number 29190 in the current listing, which it says is is not included, is the black right-angle assembly square you see in the picture used with the corner clamping jig in question.
Can I make accurately T-joints of different and equal thickness with this item?
Carlos Otto C on Feb 14, 2019
BEST ANSWER: I just use it with clamp it because I just make boxes for cabnets
I bought two of these corner jig clamps and they arrived with out the black angle pieces shown in the photos. Are they not included? The clamps appear to be useless without them.
Larry Q on Feb 3, 2018
BEST ANSWER: It's used with the Clamp-It® #29190, sold separately.