... form electric outlet before loading a bitPress shaft lock button, use the collet wrench to loosen the collet nut. Insert the ... ,. But avoid excess tightening of the collet nut and never use the damaged bit.There is an off/on switch. When ... manicure5.Quiet and Smooth 6.Portable & Easy to carry out7.Multi use: carving, engraving, routing, grinding, sharpening, sanding, polishing, drilling and so ...