The kit comes with the tried and tested high speed engraving tool GG 12 (12-18V, 20,000 rpm, fitted in a ball bearing assembly) powered by the included AC adapter (12V, 0.5A), patterns and instruction booklet as well as all necessary bits: 1 each 1/32" and 5/64" (1.0 and 1.8 mm) diamond grinding bits with spherical head for engraving and line work as well as 1 each silicon carbide grinding bits in both conical and bullet shape for frosting glass. Carve and engrave the finest details in metal, wood, plastic and glass. For more details on the tool see Engraving Tool GG 12 - 28592. Note: The unit requires a 12 V power source. Please see our AC Adapters NG 2/S and NG 5/E for details. Proxxon tools come with a 2 year factory warranty.