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 Make perfect joints with our Box Joint Jig and NEW Cauls! Uniformly spaced pressure points clamp individual box joint fingers at the corners to
give you the tightest joints possible. Simply align the pressure points with box joint
fingers and tighten in place with one or more Deluxe Ratcheting Band Clamps (41419, sold separately).
Slots on the outside of the cauls are made to hold pennies firmly in place to support
your Band Clamps at varying heights. Plastic cauls stand 6-1/4" (1/4" Cauls), 6-3/8"
(3/8" Cauls) and 6-1/2" (1/2" Cauls) tall. Four Cauls per pack. Patent pending.
Customer Reviews and Photos for:
Box Joint Cauls
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Average Rating:
4.1
(9 customer reviews)
$32.97
Add your review...
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1) Submitted by
Pat, from San Diego, CA
on 7/19/2011
Customer Rating: 
I did a long run of boxes as gifts using box joints. I bought the cauls as soon as they came out. I wish I had them from the start. They work great. They bring the joints together tight and square and line up just fine. I do not know why some others have had trouble getting thirs to line up. I have had no such problems. I have only used the 1/4" models. If you find you have trouble getting enough clamping pressure, as I did once when I had the jig adjusted so the joints were too tight, get a second strap clamp and you should be fine.
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2) Submitted by
PAul K. Bradley, from Casper, WY
on 7/11/2011
Customer Rating:
This was just what I needed. I got exactly what I expected. I have been very happy with all my purcheses from Rockler.
Thanks
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3) Submitted by
Michael Perry, from Colerain, NC
on 3/17/2011
Customer Rating:
Excellent product. Helps glue up perfect tight fighting
joints.
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4) Submitted by
HM, from Grand Rapids, MI
on 12/23/2010
Customer Rating: 
We make a fair number of boxes using simple box joints. Our equipment to cut the joints yields milled stock with perfect fitting box joints. We decided to buy the cauls and band clamps from Rockler to assist in gluing up the milled stock and generally the results were okay after we made a few changes. We had to place a thin shim under each caul to bring it to the proper height that would not find the cauls touching the wrong points. Also we were forced to add our standard bar clamps to bring the joints in tightly at all points. The band clamps simply cannot exert enough concentrated pressure to pull a joint together from top to bottom. We will probably glue shims on each caul to remedy that problem and use the band clamp with bar clamps.
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5) Submitted by
Mark Fuller, from Poway, CA
on 10/31/2010
Customer Rating:
I have found no better way to glue up a perfectly tight Box Joint. Excellent product.
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6) Submitted by
Old School Skill
on 9/8/2010
Customer Rating:
This is a well-designed, easy-to-use clamping system.
Many experienced woodworkers have made or could make similar cauls, but at this price it's hardly worth the effort. Also, wood-glue doesn't permanently stick to plastic so these are somewhat better than homemade wooden cauls. It's easy to clean off the dried squeeze-out afterwards.
Using suggestions from many woodworkers and online sources, Rockler has incorporated several of the best ideas into one system. Though each of the three sets are sized for specific finger-joints or "Box joints" as some call them these will work for other box construction methods too. These are a bit small, intended for small gift boxes but you can buy two or more sets for larger carcass constructions.
Of course, NO clamp can repair a mulligan, but with accurately-cut joints, these cauls pull boxes together fast, neat, tight and square.
I am usually NOT a fan of plastic gizmos, but Rockler has a real winner here. The price is fair. The product works as advertised. Good deal.
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7) Submitted by
Cliff, from Butler, PA
on 10/15/2010
Customer Rating:
I used these and the ratcheting bandclamps and they did not pull the joints togehter. I hand filed each joint to make sure of a nice fit.I did use the Rockler box joint jig that I bought, that did work very well. I still had to use clamos to pull it tight.I also used corner clamps to keep it square. Overall it is okay.
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8) Submitted by
Robert Peterson, from Duluth, MN
on 6/17/2011
Customer Rating: 
I make a lot of boxes using a Leigh Box Joint jig. By virtue of the joint design the joints must be accurate or they will not fit. I have tried using the 1/4 inch Caul on several occasions only to rip it off and clamp the box my own way. The cauls only line up for the first 2 to 3 inches of the corner. At that point they are exerting pressure on the wrong location. If my boxes were only three inches deep this tool would be fine but I find them totally worthless for deeper boxes. Waste of money!
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9) Submitted by
Jeff B, from Portland , OR
on 9/20/2010
Customer Rating:
This box join caul is almost perfect and is a very good addition to any shop where box joints are on the "to do list." If you have used box joints before, you know that clamping correctly is a challenge. Lateral pressure must be applied to the "teeth" of the joints on both sides of a corner simultaneously. If simple cauls or clamps are placed adjacent to but not on the teeth, softer woods tend to flex, preventing all of the mating surfaces in the joint from making solid contact. I'd been planning to make some cauls myself, but I'm pleased that Rockler beat me to it-they would be a pain for me to make, and shop-made cauls wouldn't be nearly so nice.
The good: Handy size, could be stacked to longer joints larger boxes. One end of each caul is marked with a big + sign making set-up a breeze each caul is flipped relative to it's neighbors. Glue doesn't really stick to the plastic wooden shop-made cauls have this problem. The cauls are sturdy and can be given a little whack with a rubber mallet during the clamping procedure to tighten up the joints.
The OK: The ends of the caul teeth that apply pressure to the wood are not solid-they are hollow with a cross of plastic in the middle. This may be required for the molding process, but the decreased surface area does allow the cauls to mar softer wood if the cauls are tapped to tighten up the joints leaving little squares with a cross in the middle on each tooth. This would likely not be a problem with hard woods and is only an issue if the cauls are tapped with a rubber mallet during the glue-up, so it is a problem that can be avoided if care is taken...but a mallet is really handy to suck the joints together. The Rockler band clamps I purchased for use with the cauls have slightly lighter nylon strap material than I would like. The bands are also very long 15', so I will cut them down to a more manageable size. Better too long than too short. In any case, they did the job.
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