1. Adjustable Speed: This nail polish machine replacement handle is powered by a miniature motor that uses a non stepping speed system to support outputs from 0 to 40,000rpm 2. Powerful Torsion: This nail polisher replacement handle has a torsion of up to 6.8N.cm, applying the process of powerful and strong bite, it will not stop in the middle, rest assured that use. 3. Excellent Metal Material: This nail polisher replacement handle is made of excellent quality metal material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 4. Wide Application: This nail grinder replacement handle can work well in polishing, cutting, milling, trimming, grinding, casting molds or materials. 5. Good Compatibility: This nail grinder replacement handle has good compatibility and works with all port matched grinders. Spec: Item Type: Brushless Nail Drill Handle Material: Metal Speed: 0-40000r/min Torsion: 6.8N.CM How to Use: Install and use directly. PackageList: 1 x Brushless Nail Drill Handle 2 x Rubber RingsWide Application: This nail grinder replacement handle can work well in polishing, cutting, milling, trimming, grinding, casting molds or materials. Excellent Metal Material: This nail polisher replacement handle is made of excellent quality metal material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. Good Compatibility: This nail grinder replacement handle has good compatibility and works with all port matched grinders. Powerful Torsion: This nail polisher replacement handle has a torsion of up to 6.8N.cm, applying the process of powerful and strong bite, it will not stop in the middle, rest assured that use. Adjustable Speed: This nail polish machine replacement handle is powered by a miniature motor that uses a non stepping speed system to support outputs from 0 to 40,000rpm.