The Proxxon 28635 GG 12 engraving machine is a tool designed for fine, intricate engravings on metal and wood surfaces. It has a maximum engraving speed of 12,000 rpm and a 12 to 18 VDC power supply for safe and secure operation. The 28635 GG 12 comes with a variety of accessories, including a power cord, an engraving tool bit, a stroke reduction plate, and a mounting plate. This tool is suitable for a wide range of tasks including etching, sign making, and steel engraving.