SC320I Nail drills for acrylic nails: low vibration, low noise, not heat up with ventilation hole; UK Plug Lightweight & Low-heat Handpiece: Our nail efile is Made of high-quality aluminum alloy, Which is lightweight, and long-term operation without fatigue. Works with all kinds of 3/32” drill bits, we have equipped you with 6. Its twist lock system that lets you easily change the bit. E file machine with a foot pedal works as an extra on/off button when your hands are busy Warmly Remind: Please use the nail drill machine according to our recommended speed: For Nail Prep: 8000-12000RPM/ For Sanding Band Use:>15000RPM/ For Gel Removal:>25000RPM/ For Shortening Nails:35000 RPM; The handle needs to be cleaned promptly, otherwise dust may block the heat dissipation holes causing the handle to become hot and smell, so it is recommended that you clean the handle regularly and store it prope Nail drill set accessories: comes with 6 nail drill bits and 6 nail drill sanding bands; small size and lightweight, 6 bit holders to save your frequently used drill bits