specifications:<br />color: black， white， green<br />material: plasticmetal<br />power:single phaes， 50-60hz， double insulated<br />rpm: single speed: 20，000; variable speed: 3000~20，000<br />collet: collets: 2.4 or 3.2mm<br />spring chuck type: 0.3~3.2mm<br />dimendions: 160mmx24mm lxd<br />powered by: 110-240 v， 50-60 hz<br />output: 9v/500ma<br /><br />nail tools<br />trim and beautify your nails with this easy-to-e tool<br />length: 6.2 inches/160mm<br />both needle and grinding sand ring axis shaft are 2.35mm，suitable for 2.4mm diameter hole grinding hine; inner diameter of sand ring is 6.35mm.<br />multi purposes: carving， engraving， routing， grinding， sharpening， sanding， polishing， drilling and more<br />pen shape and comfortable grip design for easy operations<br />includes 6 interchangeable metal bits/ filing heads and 6 sanding bands 80#，120#，180# <br />two controlling speeds: /slow<br />low noise and slight vibration for smooth and long-time operation<br /><br />note: please don't touch the bit with bare hands after ing it as it is too hot<br /><br />package includes<br />1 x nail tools<br />1 x  ac power adapter<br />6 x metal bits<br />1 x manual