Diamond Tipped Power Engraver Pen Battery-powered engraving tool that's almost as easy to use as writing with a pen Inscribe name or other identification on valuables to deter theft, increase likelihood of recovery Smooth, internal DC motor rotates shaft 10,000 RPM; diamond-embedded tip scribes steel, glass, wood Convenient thumb button on barrel controls on/off; 2 AA batteries power for several jobs (not incl) Use to safeguard jewelry, watches, bikes, tools, electronics, computers and other important items