ITEM NAME:Electric Angle Grinder Jade Carving Polishing Micro Drill Engraving Pen #gib Store Home Promotion Hot Item Add to Fav.Perfect grinder - Perfect electric grinder for cutting, engraving, milling, grinding, polishing, disassembly and drilling. 1 X Engraving Pen. Variable Speed Mode: Non-Variable Speed. No-load speed: 16000 r/min.