90 Degree Clamp, Cabinet Clamp, 5.5" x 5.5"(14 x 14cm) Aluminum Alloy Right Angle square Tool, Corner Clamps for Woodworking Tools, Right Angle Clamp, Drawers, Picture Frame (4pack)

These corner clamps are excellent. They are accurate, easy to use, and are very versatile. The quality is also top-notch. I was very impressed by the fit and finish of these when I first opened them up, these are S-tier quality.The clamps that come with these are great, but you can also use other f-style clamps with them if you need to use more than one clamp per side.These became a go-to tool in my toolbox after the first use. The 5.5" length is perfect for a lot of my work. And after enough experience with these, you'll find some clever "hacks" that will make these indispensable in your workflow. For example, if you clamp two of them together into a "C" shape, you now have a tool for making perfectly parallel marks on work pieces or holding on work piece parallel to a second one. This is a hack a use a lot for spacing shelves, since it's easier than finding a scrap board to cut down to size.I would recommend getting 8 of them if you plan on using these to build boxes. You really can't have too many of these in your shop.

These clamping angles a great wood shop tool. Very affordable and well made. Etched in both metric and standard measurements for specific clamping applications. Retaining knobs are easy to use with one hand during assembly.I bought these for use while building a large built-in cabinet in our pantry. They definitely came in handy while getting everything aligned while gluing the corner joints.

These clamps work well in holding plywood and other types of wood panels square while connecting panels together. Works nicely on either the inside or the outside joints to keep panels aligned and square. Clamps are nice and strong and hold the squares tightly against the wood, like a second pair of hands.

Love these. They work really well and come in handy often.

Good weight, not cheap feeling perfect size and most of all sturdy and square.

Sturdy. Well made. Should last a lifetime+The video is silly with the clamp on the outside. The second clamp is redundant and will likely get on the way.

Overall, the clamp delivers a winning combination of ease of use, accuracy, and versatility, making it a great choice for both beginners and experienced DIYers. It is a great option for anyone looking for a user-friendly and versatile clamping solution:Ease of Use: Setting up the clamp is a breeze. No complex mechanisms or confusing instructions to deal with.Simple Setup: The clamp is easy to get up and running quickly, saving you time and frustration.Easy to Use Knobs: The retaining knobs are designed for effortless tightening, even for extended use.

These are great clamps, but as with all things, you get what you pay for. Based on my digital angle finder, the accuracy of these clamps (inside and out) are about +/- 0.1°. The error equates to about 1/32" over 18". That can certainly become significant over longer lengths, but so far I haven't found it to be a big issue. Other sources of error like material cut accuracy, movement in materials, work surface accuracy, etc seem to offset this one way or the other. Also, as others have said, holes in the angles are a little too big for the posts. They could be smaller, but with a little patience and care, they can still be installed without too much fuss. Do these two details warrant a poor review? Certainly not! If extreme precision is an absolute must, then the high end red brand can be purchased for about 200 bucks more than these. Again, you get what you pay for, and these are well worth the price. I might break down and spend the 250 bucks for the good set of four someday, but until that time, I'm quite happy with these.