1. Light weight handpiece for comfortable grip (Handpiece weight: 160g) 2. Low noise and vibration for smooth and long-time operation Twist handpiece for security the bit firmly 3. Ventilation for reducing the handpiece heat 4. Great for nail techs, podiatrists, dental techs, veterinarians, students, hobbyists Specification: Hand Piece Weight: 160g Voltage: 110V-240V 50Hz Package size: 24.6* 20.8* 10cm/ 9.7*8.2*3.94in Key Feature: 18000-30000RPM with precision sliding speed control box Durable: Headpiece is made of hing quality aluminum, ventilation design for long use Comfortable: Low noise and vibration Easy to Operate: Speed control knob, with forward and reverse operation switch Change without Tools: 6 optional standard 3/32" bits Suitable for natural nails and artificial nails Multi-use: carving, sanding, polishing, shaping and so on Package: 1 x Nail Drill Machine 1 x Handpiece 1 x Handpiece Holder 6 x Optional Bits 5 x Sanding Bands 1 x Foot Pedal Notice: Please don't turn or twist the silver part in front of the white rubber sleeve, or the handpiece will get damaged. After you bought this nail drill set, we will email the user manual to you within two working days. Please read our manual carefully before using, thanks.