Wolfcraft's Angle Clamp Set, they are universal, suitable for boards from 0.4 to 0.9 inches thick, you can use them for almost any home project - whether it's a small cabinet or a picture frame. You can install with one hand, leaving your other hand free to hold the part or tool, which is handy when you're working alone. They automatically adjust to the thickness of the board due to the spring system, no need to twist or adjust anything. Made of durable fiberglass, they will last a long time, with soft, non-slip pads on the clamping surfaces, your piece will be securely clamped, but there will be no clamping marks. Do you know who these clamps are a godsend for? For those who like to make furniture with their own hands. With them you can not only fix parts at right angles, but also simultaneously drill and drive screws.