... bit, cutter, carving knife, computer engraving machine, engraving machine grinder sharpener is aimed at turning tool, bit, cutter, carving ... length(mm):1500,2000, 2500, 3000,3500,4500 can be selected. grinder sharpener Precision type:High-precision, high transmission ball ... inverter, easy to control speed of grinding wheel, grinder running smoothly, no impact.Germany technology and germany design ...