Power Engraving Pen is made for both personal and professional use, allowing you to customise on a variety of different surfaces. It works with wood, steel, bamboo, metal, rubber, acrylic, glass, leather, and plastic. Customise and personalise anything you want - including cups, teacups, shot glasses, jewellery, keys, key chains, bracelets, wallets, belt buckles, phone cases, sunglasses, containers, and much more!