OWSOO Portable Engraving Pen Electric Drill Pen Speed Display Carving Pen Engraving Machine Graver Tools Rechargeable Grinding Machine

C-harging and plugging dual use, can be connected to while charging, more efficient.;There is an inner hexagon wrench receiving hole at rear.;Jacking type grinding heads lock mode, no skid.;LED displays , speed, and load information, giving you more accurate control of Grind Tool.;Made of fine quality material for long service time.