This electric nail drill pen is suitable for nail drill machine which has DC connector and the rotating speed is 30000RPM. A nice option for home use and salon use. Features: It is a manicure pedicure machine with strong motor, low noise and steady vibration when using. Easy to change drill bits. Designed for nail polishing, callus removing, engraving, grinding and more. Compact and portable pen design, easy to carry, suitable for use at home, nail salon or in travel. 30000RPM professional nail drill handpiece, suitable for DC connector nail drill machines. Ergonomic gripping handle, comfortable to hold, good for operation. Note 1: Suitable for 9V-15V plug-in nail drill machine which has DC connector. Note 2: Outer diameter of the DC connector is 5.5mm, and the length of the DC connector is 12mm. Specifications: Type: Nail Drill Handpiece Material: Metal; ABS Rotary Speed: 0-30000RPM Working Voltage: DC 9-12V Color: White, Black, Pink, Blue, Red (Optional) Item Size: Approx. 16.7 * 2.35cm / 6.57 * 0.93in Item Weight: Approx. 132g / 4.64oz Package Size: Approx. 23.7 * 4.5 * 4.0cm / 9.33 * 1.77 * 1.57in Package Weight: Approx. 160g / 5.64oz Package List: 1 * Nail Drill Handpiece