Littlepiano Punch Stamp Die Set Metal 9pcs Numbers Alphabet Craft Tools Material: Carbon Steel.Size: 2mm / 2.5mm / 3mm / 4mm / 5mm / 6mm / 8mm / 10mm / 12.5mm The number stamps included 9 pieces. (From 0 to 9, The "6" is also used as "9") Stamps are made of extra hard steel (40CR) Heat treated and hardened. The hardness on the stamping end is HRC 50-55. This gives durability and long life using You can choose letters from size of 2mm / 2.5mm / 3mm / 4mm / 5mm / 6mm / 8mm / 10mm / 12.5mm height Package Included:1 Set Stamp Number Die Punch