Auto-adjustable 90° Corner Clamp Joints &T Joints Gadget multifunction Tools Compatible with Kreg Jigs Wood-working, Engineering, Welding, Carpenter, Photo Framing

Just by measuring the inside of this clamp with a machinist square, it’s apparent that you can’t actually clamp anything with it at a right angle. None of the inner angles matched up with my machinist square, and when I measured the inside of the clamp with a digital angle gauge, it was a full degree out of square. I’ve attached some pictures showing the mismatch with the machinist square along with the digital angle gauge showing that my machine a square is at 90° and the clamp is at 91°.I also found it difficult to practically test the clamp; there’s a lot of play in the connections, pieces slip around due to the slick paint, and the out-of-square nature makes pieces not clamp securely.if you’re a beginner and not worried about keeping pieces as close to 90° as possible, this might work for you, otherwise, you’d be better served by saving up for a clamp from a more proven brand (e.g., Milescraft, Kreg, Bessey).

I'll admit it. I didn't pay attention when I purchased this. I saw a warehouse deal popup and I clicked on it. I actually thought it was the Kreg brand. The box it came in was nondescript, but I didn't find that unusual because it was a warehouse deal. As soon as I took it out of the box, I could feel the difference. It looks close enough to the Kreg's version, but it feels like plastic. I tested it out as to give it a honest try, but 9 times out of 10 it failed to clamp properly. I kept having the wiggle to blue miter piece to get it engage.

I got this clamp because it seemed innovative and it was advertised as "Compatible with Kreg Jigs". I clamped this to a dovetail joint box, and it works fine for holding that joint in place after gluing, but I noticed that it wouldn't be sufficient for use with installing pockethole screws. You can do it, but only one hole at a time at the bottom, if your box is deep enough. You'd have to remove the clamp to install the top hole, or switch it to the other side if you don't have a bottom on your box yet.This looks like a regular vice grip style clamp, but it's actually more sophisticated that that. The clamp pressure is spring loaded, which is nice because it means when clamping wood you have much less chance of denting the wood if you tighten too much. I think this feature is pretty good, but the adjustment screw is a little hard to turn. It's a very small diameter knurled knob, which means it takes more force to turn it, and in some positions, there is a significant force on the screw, making it even harder to turn. I had the best luck using just my thumb to turn it in and out, rather than trying to turn it with finger and thumb, because it's so tiny and you can't really get a good grip on it.Although I've not tested it on 1.5", it does look like it can corner clamp up to that thickness, but probably nothing bigger. This can also be used to clamp boards in a T configuration, perhaps if you're doing mortise and tenon, but again, not really good for pocket screws unless you do one at the bottom then flip the clamp for the top. The maximum passthrough thickness of the board is 1". And although there were no instructions provided with the clamp, you can loosen the screw through the silver angle backer and flip it so the passthrough goes the other way.I think it's a decent corner clamp for certain things. Namely, if you are dovetailing or end screwing (not really a good idea to screw into the end grain of any board, but people do it), it will be great. It's not really compatible with a pocket hole jig except in certain limited circumstances.

This is a cheap knock off ... no better way to put it.Manufacturing quality is very lacking, dimensions of the castings aren't right, materials are sub par. Just get a good one.

These clamps are cheaply made, the adjustment screw is made to adjust the tension of the clamp but it is impossible to turn by hand. Also the Handel of the clamp bends when pressure is applied.