The Assembly Block is an innovative product that helps you to put together cabinets quickly and squarely in no time at all. Connect the two sides of the Assembly Block to form a corner and secure them to your work bench with screws. Then close the clamps on the Assembly to secure cabinet panels from 7/16" to 1-3/8" thickness. The Assembly Block is made from heavy-duty glass filled ABS super-resistant material. Once the cabinet panels are in the clamps, screw them together. This product is ideal for one man shops, when you need multiple hands to hold everything square. Made in China.