... engrave, rout. Grind, sharpen, sand, polish, drill and more Unplug the tool form electric outlet before loading ... loosen the collet nut. Insert the bit, and tighten the collet securely,. But avoid excess ... or Home Use 4.Suitable for pedicure and manicure5.Quiet and Smooth 6.Portable & Easy to carry ... , routing, grinding, sharpening, sanding, polishing, drilling and so on 8.The nail file can be used ...