【Size of the Number Stamps】 The alphabet, number and symbol are about 5 mm in diameter. 【37 Pieces Letter Stamps】 6mm letter stamps include 26 uppercase letters A to Z, numbers 0 to 8 (6 and 9 are interchangeable) and symbols '&' and ''. 【Durable Material】 The number and letter stamps are made of high quality iron for strength and hardness. These attributes reduce wear and tear and ensure durability. of metal punches with numbers and letters. 【Personalize Letter Punch】 Use letter and number punch kits, personalize your crafts, jewelry, cards, leather decorations, etc. Metal punch is a practical tool set for craft lovers. 【Wide Application】 6mm Number Punch is very suitable for printing on materials such as metals, plastics, leather and wooden objects. The surface of the Metal Stamp Set can contain oil to protect it from rust.