stepped punch 1,consistent quality control 2,made-to-order service available ... ,Material:HSS M-2, SKH-9, SKD11,ASP23,ASP3 ITEM stepped punch Specifications and Variables Highly polished finish 6-8 micro finish ... are a professional manufacturer of Core Pins, Metric Core Pins, Punch, Punch Pins, Guide Pins, Dowel Pins, Parallel Pins, Guide Pillar, Guide ...