d4 [Size] 3.5mm (1 piece) [36-Piece Stamp Set] This is a letter stamp set for original leathercraft production. It includes 26 alphabet stamps (A-Z) and 10 number stamps (0-9), along with a handle. [Rust-Resistant Stainless Steel] The stamp part is made of stainless steel. The handle is made of stainless steel. It is made of durable and long-lasting materials, making it easy for beginners to use. Sizes of 3.5mm and 6.5mm are available. [Easy to Use] Easy to use. Set the stamp of the desired letter on the handle, hold it vertically, and strike it with a hammer. Using a stable base such as a metal palette will help prevent blurring and allow for clear stamping. [Handmade Essentials] Can be used for handmade leathercraft such as keychains, pet collars, name tags, accessories, and wallets.