For hand held, hammer struck applications. GROZ, Letter and Number Stamps are manufactured from select quality carbon steel. Punches are through induction hardened, which gives durability and extended life for repeated use. The hardness at the stamping end is maintained at 58-62 HRC, the striking end is tempered to 35-42 HRC. This prevents the punch from splintering during use. The striking end is chamfered to prevent breakage and accidents due to flying splinters.

For hand held, hammer struck applications. GROZ, Letter and Number Stamps are manufactured from select quality carbon steel. Punches are through induction hardened, which gives durability and extended life for repeated use. The hardness at the stamping end is maintained at 58-62 HRC, the striking end is tempered to 35-42 HRC. This prevents the punch from splintering during use. The striking end is chamfered to prevent breakage and accidents due to flying splinters.