... carver, engrave, rout. Grind, sharpen, sand, polish, drill and more 2. Unplug the tool form electric outlet before ... loading a bit3.Press shaft lock button, use the collet wrench to loosen the collet ... nut. Insert the bit, and tighten the collet securely,. But avoid excess ... the collet nut and never use the damaged bit.4.There is an off/on switch. When ...