Product description : • made from high quality tested carbon steel.• special material and double induction hardening give very high quality of stamping.• head is tempered to prevent chipping while hammering. stamp specification stamp size inch mm 0,1,2,3,4,5,6,7,8 1/16 1 3/32 2 1/8 3 5/32 4 3/16 5 1/4 6 5/16 8 3/8 10 1/2 12 a-z,& 1/16 1 3/32 2 1/8 3 5/32 4 3/16 5 1/4 6 5/16 8 3/8 10 1/2 12 contact us.