Features: Collets type: 2.4mm Voltage: AC 100-240V (EU plug) 50/60HZ Variable speed control: 18000 RPM up to 20,000 RPM Light Weight and Portable The nail drill can be used for natural nails as well as artificial nails Perfect for professional or home use This tool is design for carver, engrave, rout. Grind, sharpen, sand, polish, drill and more Unplug the tool form electric outlet before loading a bit Press shaft lock button, use the collet wrench to loosen the collet nut. Insert the bit, and tighten the collet securely,. But avoid excess tightening of the