The engraver GG 12 spins at 20 000 rpm yet weighs only 4 ounces! It allows for easy control and thus very safe operation featuring a touch sensitive switch for easy use and a simple push in/pull out shaft holder for easy accessory changeover (shaft capacity Diameter 3/32" only). The set includes: Engraver GG 12 AC adapter (12 - 18V 0.5A) trial glass and four bits: two spherical head diamond grinding bits Diameter 1/32" and Diameter 5/64" for engraving and line work two silicon carbide grinding bits (conical and bullet shape) for shading and frosting (all shanks 3/32" as well as one corundum grinding bit in ball and cylinder shape for grinding and engraving). The bits are also optimal for working on metal stone shell and other hard materials. Direct voltage: 12 - 18V. Speed: 20 000 rpm. Length: 5.7".
From the Manufacturer
Proxxon Complete Glass Engraving Set, GG12 kit comes with trial glass, engraving patterns and four engraving bits so you can start engraving right away. The engraver spins at 20,000rpm yet weighs only 4 ounces. It allows for easy pen like control of tool and has touch sensitive on/off control and push in/pull out shaft holder for easy bit changes. The set includes 28592 rotary engraver, AC adapter 12-18V, 4 bits and sturdy plastic carrying case.