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