36pcs - 1/4" 6mm Number & Letter Steel Punch Set Stamp fun or meaningful phrases, initials, etc. on copper, silver, brass and many other materials Punch size 6MM (approximately 1/4") Includes capital letters marked A  Z, the & symbol, numbers 0  8 (6 turned upside-down makes 9) CR-V steel, drop forged and heat treated WARNING: this item has factory grease on the punches. Always wear protective gloves and proper safety glasses.