8"x8" bending jig. Use it to bend circles, radii, offests, squares, rectangles, and triangles. It comes with a bolt on 1" hardy shank and four pins. The pins are 1/2" and you can slip 1/2" drive sockets over them for a multitude of different radii. The bolt on hardy can be removed/replaced to fit your anvil, vise or even bolt down to a bench. The jig also has 9/16, 3/4, and 1" holes for those time when you need a hole larger than your anvil pritchel.