1. Made from durable tool steel, this stamp provides excellent hardness and longevity, ensuring long-lasting wear resistance.2. With precise edges, number punch set allows for quick and efficient marking of numbers on tags, keys, keychains, pendants, dog tags, signature stamps, etc., making it a great accessory or personalized gift.3. Suitable for various applications, including metalworking, jewelry making, woodworking, and leather crafting, stamp punch tool can be used to mark or engrave on soft metals like aluminum, tin, copper, brass, as well as wood.4. Ensure that the surface you are stamping on is clean, flat, and securely held in place to avoid errors or misalignment.