Key Features Tester glass supplied with engraving tool GG 12 12 - 18V, 20,000rpm spindle speed, fitted with ball bearing TUV approved mains adapter (12V, 0.5A), motifs and instruction booklet Bits 1.0 & 1.8mm diamond grinding bits with spherical head for engraving & line work Silicon carbide grinding bits in both conical and bullet shape for frosting glass as well as carborundum grinding bits in ball and cylinder shape for grinding and engraving Description Supplied with a tester glass so you can start engraving immediately. GG 12 engraving tool, 12-18V, 20,000 rpm spindle speed, fitted with ball bearing. TUV approved mains adaptor (12 V, 0.5 A), motifs and instruction booklet. 1.0 and 1.8mm diamond grinding bits with spherical head for engraving and line work. Silicon carbide grinding bits in both conical and bullet shape for frosting glass as well as carborundum grinding bits in ball and cylinder shape for grinding and engraving.