1. Number punch size. The diameter of the letters, numbers and symbols is approximately 5 mm. 2. 37 - piece letter punch set. The 6mm letter punch set includes 26 uppercase letters A - Z, numbers 0 - 8 (6 and 9 are interchangeable) and the symbols "&" and ". 3. Durable material. The number and letter punch set is made of iron, which helps ensure durability and hardness. These features can reduce wear and tear and increase the durability of the metal letter and number punch. 4. Personalized letter punch set. Use the letter and number punch set to personalize your crafts, jewelry, greeting cards, leather decorations, etc. The metal punch set is a practical tool kit for craft enthusiasts. 5. The universal 6mm punch is suitable for printing on materials such as metal, plastic, leather and wooden objects. 6. There may be oil on the surface of the metal seal component to prevent rust. 7. Note: All data are measured manually, so a 1 - 3 cm error can be allowed. Due to light and monitor differences, the color may vary depending on the actual item received (According to the main picture). 8. Thank you for purchasing store products, and we wish you a happy day.