... carver, engrave, rout. Grind, sharpen, sand, polish, drill and more 2. Unplug the tool form electric outlet before ... collet wrench to loosen the collet nut. Insert the bit, and tighten the collet securely,. But avoid excess ... of the collet nut and never use the damaged bit.4.There is an off/on switch. When ... it.Specification Light Weight and Portable The nail drill can be used for natural nails as well ...