●Material: Stainless Steel; Made of high quality steel, practical and durable ●Set includes numbers 0 to 9 and 26 alphabet letters. Letter size is 6mm ●Can be used for metal marking needs, leatherwork, wood, dog name tags, jewelry and art. Easy and easy to use ●Just hammer and hit! Create your own leather products ●How to use: (1) Set the tip of the hammer to any engraving, then tap it vertically with a hammer to knock it onto the leather grained with water. (2) It is difficult to shake when used on a flat and stable base such as marble or rubber board, and can be used for sharper engraving