... 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 ... engraving, routing, grinding, sharpening, sanding, polishing, drilling and so on 8.The nail file can be used ... Color: Pink,blue,purple,white ,Golden ,Slivery and so on Package include:1 x Electric Pen- ...