HHIP 13 piece combo drive pin punch set is made of heat-treated tool steel. These have been ground and polished. The bodies are knurled. Set includes 8 pieces that are 4" long from 1/16-5/16. Also included is 5 pieces that are 8" long in 1/8", 3/16", 1/4", 5/16", and 3/8" sizes. Complete with vinyl pouch.