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Rockler Clamp-It® Corner Clamping Jig

Firmly holds panels at a precise right angle, freeing up your hands so you can drive fasteners.
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
Notice: 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''
4.5 / 5.0
283 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great clamps free up your hands
December 13, 2019
over 4 years ago
Woodworking Experience:
Your third hand
Used these clamps, 4 of them, when building new Kitchen cabinets and storage units for the Living Room. They really help hold large pieces of plywood in place while assembling the cases.
December 12, 2019
over 3 years ago
Woodworking Experience:
Using them to build kitchen cabinets and they work great
December 9, 2019
3 weeks ago
Makes Assembly Easy
Very handy assembling large "box" cabinets.
November 29, 2019
1 month ago
Woodworking Experience:
Love the product they work great!
November 29, 2019
1 month ago
Woodworking Experience:
Great Product
I ordered 4 of these and they work great
November 28, 2019
1 month ago
Woodworking Experience:
works as expected
It works good and is easy to use.
November 21, 2019
1 month ago
Woodworking Experience:
Rockler Clampit Corner Clamping Jig
Worked extremely in making a kitchen cabinet. Used it upside down to square the corner at the top. Great tool.
November 21, 2019
1 month ago
Great product
I just bought a second one as I love the way they work.
November 21, 2019
1 month ago
Woodworking Experience:
A must have!!
November 10, 2019
1 month ago
Woodworking Experience:
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Browse 19 questions Browse 19 questions and 94 answers
Why did you choose this?
Rockler Store
Christmas gift for husband! It’ll make corners so much easier!
Connie Y on Dec 12, 2019
Ad in Wood magazine
Carol J on Dec 10, 2019
Christmas gift for husband! It’ll make corners so much easier!
Connie Y on Dec 12, 2019
Husbands Christmas presents
Markita W on Dec 11, 2019
Ad in Wood magazine
Carol J on Dec 10, 2019
Christmas Gift suggestion.
Ken S on Dec 9, 2019
You have quality tools.
Jessie B on Dec 9, 2019
Christmas wish list
Kathleen A on Dec 8, 2019
to simplify task
Brian J on Dec 8, 2019
Thomas W on Dec 8, 2019
My husband wanted it for Christmas
Carol K on Dec 7, 2019
Will be building some new drawers for our kitchen cabinets and these will be very helpful.
Michael T on Dec 6, 2019
xmas gift
Jeannette W on Dec 5, 2019
Laura W on Dec 5, 2019
Got one, need to collect three more.
John W on Dec 3, 2019
Looks like it will be easy to use and when you need an extra hand
Garret D on Dec 2, 2019
a friend let me use his and i loved how they kept the wood in place.
Miguel T on Dec 2, 2019
To make joinery simpler and quicker
Margaret H on Dec 1, 2019
To make corner clamping easiest when assembling and gluing pieces.
Michael F on Dec 1, 2019
have one and needed another
Daniel on Nov 30, 2019
looks like a handy tool
Douglas G on Nov 30, 2019
I have used Rockler jigs in the past and they work as advertised
Pat D on Nov 30, 2019
Requested as a Gift.
Jaunese O on Nov 29, 2019
speed things up
Timothy S on Nov 28, 2019
Making mdf and plywood boxes/cabinets
Mark R on Nov 27, 2019
It's on my brother-in-law's wish list.
Margaret N on Nov 27, 2019
wanted something fast and easy AND accurate
John F on Nov 27, 2019
Innovated design, Practical , smart. HANDY
ASLI G on Nov 26, 2019
Roy C on Nov 25, 2019
For any box shape - bookshelves, drawers, boxes, etc. this is a "must need" jig
DIANEKNIGHT on Nov 25, 2019
I build a lot of cabinets & wanted to give them a try.
J U on Nov 24, 2019
I am making new kitchen cabinets for a house I bought and need another couple of hands or a good squaring clamp . I trust Rockler and look forward to getting these as well as the clampit clips.
Steve S on Nov 23, 2019
Dennis E on Nov 23, 2019
Wanted to try this item out so see if it works
TOM M on Nov 23, 2019
I saw April using them and they made the build look quite a bit easier and more accurate.
T. Scot G on Nov 21, 2019
ease of use
donald w on Nov 21, 2019
Requested by son-in-law on Christmas wish list.
Donna G on Nov 20, 2019
Just have a big problem holding everything together when assembling cabinets.
Ronald K on Nov 18, 2019
Joseph H on Nov 18, 2019
My Son asked for these items for Christmas
Teresa S on Nov 18, 2019
Need it
Ralph D on Nov 13, 2019
Struggle to hold dorados together when building something large, I’m sure these will eliminate the struggle
Joanna K on Nov 10, 2019
My son in law chose this for Christmas.
Mary T on Nov 9, 2019
IT will make building anything with square corners easy
Thomas W on Nov 8, 2019
Like the design, think it will come in handy building drawers instead of the usual clamping assembly I use
James W on Nov 6, 2019
Shop cabinet building.
Dennis R on Nov 6, 2019
Nothing like a square corner when building furniture or cabinets
David B on Nov 5, 2019
It was recommended with the other items as complement
Willy on Nov 4, 2019
needed two more
Robert B on Nov 2, 2019
this is my second one works great
Steve S on Oct 31, 2019
Constant need
Russell A on Oct 31, 2019
extra hands
Larry H on Oct 30, 2019
Husbands Christmas presents
Markita W on Dec 11, 2019
Christmas Gift suggestion.
Ken S on Dec 9, 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
¿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
BEST ANSWER: Yes. They even supply bolts to attach it if you wanted.
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)
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 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
¿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.
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.
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