90 Degree Clamp, Corner Clamp, Right Angle for Woodworking, 4 Pack 5.5"x 5.5" Aluminum Alloy Woodworking Corner Clamps, for Picture Frame, Cabinet, Drawers with 4 Clamps & Gaskets and Gloves

I am building some cabinets and was looking for a simple solution to ensure that the sides are at right angles. I also wanted something that would hold the boards together if I was using simple butt joints and fastening with screws or nails. These did the trick and worked perfectly. It took me a little bit to figure out the best way to attach them but once I did, they work great. I began using the hole in the corner to add a clamp that would serve as a backstop for the other piece of wood to ensure that they were joined together flush. This has been a big help. These clamps are made of machines aluminum and are as close to perfectly 90 degrees as you will ever need (I didn’t measure them so can’t say for sure they are perfect). They are very sturdy and should last forever. One thing I noted is that the bolts that are used to tighten and hold the clamps on the wood are not perfectly 90 degrees so as you tighten them, there can be a tendency for the clamps to slide away. This is a very minor nit and doesn’t affect the performance of the clamp, however. All in all a great purchase and I will likely buy some more so I can have several projects going at once.

The materials these are made with appears to be excellent quality. There are nice relief cuts at that intersection so that you don't mar the finish of the clamped pieces. I like that you can use them on either the inside or the outside of the corner pieces. The 90 degree angle in the corner is dead-on accurate – as measured by the ridiculously expensive pocket square (sold by that "other" red products company). These corner clamps are a lot easier to use than some of the other options, yet they provide a very steady "hold" on the wood without marring the finish. I'm very impressed with this clamping system, and am quite happy to have saved enough (versus the "other guys") to pay for part of my project. Get them – you won't be disappointed!

Product is well-machined and square. Nice, heavy, solid, and inexpensive. Woodpeckers is too expensive for me! I used them to help keep a large subwoofer box square and it helped provide extra confidence in a stressful glue up. The hand knobs get super tight and lock in the square. I’ll use them every time I’m gluing a 90 degree angle.

Bought these for a cabinet I am making, and they worked great to keep the corners square.In combination with long bar clamps, I was able to keep all the corners nice a square while gluing things up. Double checked everything with some small machinists squares, and I wound up with nice square drawers. (Well at least as square as I'm able to measure. )They work fine with the attached clamps, but work better with external clamps as the included ones tend to mar the top edge of the surface. If you were making thin stock items (like picture frames, they're probably fine...)Overall the solid aluminum frame is surprisingly sturdy, the finish is nicely anodized, and the markers are helpful.I wouldn't rely on them as my only clamp, but in combination with other clamps they were very handy to have around.

I am working on some larger boxes and needed something that would hold a 90 degree corner. Woodpeckers stuff is crazy expensive. Don't have $150.00 to drop on something like that. Found these on Amazon and decided let's take a shot and see. When they arrived, I checked, double checked, triple checked and even 4th, 5th and sixth checked square. These things are dead nuts perfect. I used a framing square, speed squares, combo square and even tape measure with 3,4,5. Was greatly impressed. Then off to building. They hold tight, they hold square and push or pull to bring to 90. When I need more I am going to purchase another set of 4.Thank you for a quality, affordable product.

I purchased these for having in my home wood shop. I didnt have a specific need for them but wanted them for when I did.Since then I have used them for several framing/boxing jobs and they worked quite will, both internal and external corners.would recommend having these around the shop.

I am converting all my kitchen island and cabinet's shelves to drawers to easy the pain of having to reach down and deep to find stuff. As I tried to glue the first few drawers together, it was a real struggle to put all sides together being square and straight, even with my wife's help. I have those old style corner clamps for picture frame, but they are no good for drawers, they clamp from both inside and outside of the corners which makes it impossible to use bar/parallel clamps. So I decided to get a set of newer style corner clamps that can apply from just either outside or inside. I have know this type of clamp for quite a while but just can't stomach the nose bleeding high price.In searching Amazon, I stumbled on this brand of aluminum corner clamps, price is not cheap but quite reasonable, even though there were only a few reviews, but when looking at the pictures (I was assuming they are real pictures), they seemed to be well built, so I took a chance and bought a set to try out. Well, I was pleasantly surprised: the clamp set came well packaged with cut shape styrofoam slots to protect them. But most importantly, the clamp themselves are of high quality, be either machining, material and paint or the scale marks. I have used them on six drawers I subsequently made. They were more than an extra pair of hands, now it is simply just so much easier or I can even go as far to say I kind of enjoying the gluing process. So if you are in the same situation as I was, don't be hesitant, just buy one set of these and be stress free.My only improvement "complaint" is that when measured with my Starrett machinist square, they have a very small fractional degree of not 90 degree. I don't think it will effect in anyway of my use in woodworking, also I understand this is not made as machinist tool, but nonetheless it seems it could be improved without much effort as they are consistent not random.

They are what they are advertised to be. Very well built and do the job handily. Highly recommend.