Disc Cutter - Circle - 18 Punches - Wood Base - for Jewelry Making - SFC Tools - 28-591 Comes with 18 hardened steel punches ranging from 3-14mm in diameter, a round steel disc cutting block, Polished hardwood base to hold punches and the round steel disc cutter Will cut up to 20 gauge metal, and can be used on a rubber mat or block to ease the cutting process. Punch sizes (mm): 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0 Punch sizes (inches): 0.12, 0.14, 0.16, 0.18, 0.20, 0.22, 0.24, 0.26, 0.28, 0.30, 0.31, 0.33, 0.35, 0.39, 0.43, 0.47, 0.51, 0.55