Manufactured from high quality steel, punches are induction hardened which gives durability and extended life even after repeated use The hardness at the stamping end is maintained at 58-62 HRC, which prevents the punch from splintering during use The striking end is tempered to 38-43 HRC and beveled to prevent breakage Contains (9) 3" x 3/16" punches: Numbers 0 through 9 (6 and 9 are interchangeable) Shipping Weight: 1.0 lbs.