General Tools 505 Cordless Precision Engraver with Diamond Tip Bit PROTECT AND IDENTIFY- engraving tool enables precision cordless engraving with permanent identifying markings by anyone; from DIYers to the professional technician ENGRAVING DIAMOND TIP BIT- using a standard 3/32-inch engraving diamond tip bit and safe fingertip controlled on/off switch ENDLESS POSSIBILITIES - endless applications include engraving tools, sporting goods, toys, phone chargers and the delicate personalization of jewelry, watches and glassware. Also practical as a wood engraver, or part of a metal engraving kit HOLDS LIKE A PEN compact engraver has ergonomic tri-lobal grip and precise fingertip control; etching tool has a lightweight aluminum body POWER- Engraving pen has a 20,000 RPM Motor to engrave glass, metal, ceramic and plastic, only using two included AAA batteries