This alle’s nail drill with many accessories is used for manicure, pedicure,acrylic, gel, natural nails, dead skin, and cuticles removal and so on, the multifunctional nail drill can really save your money for you. which is the best helper for nail lovers. How to change the bits: 1. Please unplug the connector. 2.Choose the drill head you want. 3.Insert the drill head into the spacing. 4.Pull out the drill head after use. How to choose proper bit: Needle bit: nail carving, nail corner filing; Bullet bit: remove the small protrusion on nail surface; Conical bit: polish the nail cutting edge.The better gradient is easier for nail polish remove and smooth; Cylindrical bit (small): basic filing on small nails, grinding thick dead skin; Cylindrical bit (large): basic filing on small nails, grinding thick dead skin; Sand bands holder (biggest): insert into sand bands Specification: Input Voltage Range:110V/50-60Hz Output Voltage: 12V DC Speed: 0-20,000RPM Package List: 1 * professional nail drill 100 * sanding bands 6 * optional nail bits with 6 sanding bands 1* nail art brush How to maximize the service life for this nail drill: 1.To extend the machine life, please turn off power when changing nail bits. 2.Do not change the turning directions frequently,in order to avoid the handpiece being damaged. 3.While using,please adjust the speed gradually,do not adjust speed suddenly. 4.To prevent overheating less than 20 minutes of continuous use each time. 5.Don't rotate to open the drill body,that will damage the machinery.Mini and Lightweight: Exclusively mini, tiny and lightweight design for travel or everywhere, which is constantly improved and updating in size, function, appearance in view of user's convenience. Easy to Operate: Extremely simple operation for nail beauty, and easy to change the bits matching well with the spacing. Just a few steps to finish it, and you still look quite proficient in using it even if you a beginner. Speed Control: 0-20000rpm with an optional speed button, which makes this electric nail file easier and safer to polish your nails, which it is professional for both home and salon use. Multifunctional: Design with with professional sanding bands, nail brushes, nail bits and separators, which are used for grinding, carving, cutting, polishing for all nail arts as well as cuticle removal, etc. Professional Bearing and Motor: Adopting a professional-quality motor provides more stable operation compared to others, Premium bearing can truly achieve minimal noise, slight vibration, low heat when smoothing your nails.