SE JT-SP305 Disc Cutter Set (6 PC.) 5 punches and one cutter block Dimensions (inch): 2-7/8 x 2 7/8 x 1-5/16 Cut discs sizes (inch): 1/2, 5/8, 3/4, 7/8, and 1 High carbon steel Allows you to put sheet materials into the horizontal slot and punch out a disc and hole with a hammer