This mini electric hand drill with USB power supply can be used in your home, nail salon, etc., portable size and powerful functions. If you need it, come and try it, it will not disappoint you. Features: Necessary engraving and grinding tool: comes with 6 grinding heads different to meet the different needs of DIY carving and grinding. Widely used: suitable gelatum removal for nails, with adjustable speed of 3000 ~ 20000 rpm, mini nail drill. /> Anti-rolling and comfortable design: The practical and anti-fall handle provides superior comfort and control, giving you a better using experience. Perfect gift choice: you can send it to your friends or to your family as a birthday present, anniversary gift, etc. Easy to use: you can press and hold the sanding button, then loosen the screw of the heads and insert the heads sanding pad and turn to tighten in the opposite direction after insertion. Features: Material: plastics Color: red, white , black, blue, green, navy blue, yellow, pink (optional) Single speed: 20000 Variable speed?: 3000-20000 (adjustable) Clamp type: 2.4 or 3.2 mm Spring chuck type: 0.3-3.2mm Cable length: 920 mm / 36.2 inches Item length: 150 mm / 5.9 inch Package size: 190*130*40mm/7.5*5.1*1.6in Package weight?: 135g/4.8oz Packing list: 1 * electric grinder 1 * USB cable 6 * heads grinding 1 * User Manual