Steel Stamps Numbers And Letters Manufactured from select quality carbon steel For hand held, hammer struck applications Induction hardened for durability & extended Life Stamping end is hardened to 58 - 62 HRC Striking end tempered 38-43 HRC - prevents splintering Number Stamp Set- Contains 9 pcs. ‘0-9’. Numbers 6 & 9 are inter changeable Contact Us Enquire Now