This protect valuable equipment. Stamp your name, initials id on most all surfaces with this hardened steel marking set. the special high-carbon steel stamps will endure a lifetime of work. The 5/32 (4 mm) high characters alphabet A-Z . The complete set is organized in a protective case. Permanently mark valuables and important equipment; great way for craftsmen, jewelers, manufacturers ,artists and hobbyists to identify their handiwork. Punches mark on hard and soft-wood, gold, silver, copper and most of metals, PLEASE CLEAN AND APPLY OIL BEFORE USE. Note: Remember to wear eye protection. Note: Photographs are for illustration purpose only. Actual item may slightly differ from the pictures shown. Scorpion is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness of our products Thanks for visiting my Store...!