CE Certificate High-Speed bearings :This Nail Drill Machine has approved the CE certificate. When adjusting the speed from 0-30000 RPM:(MIN to Max),it is quite enough, the grinding is extremely fast. Professional Nail Drill Bits Set: The nail drill bits set comes with tungsten carbide drill bits 10pcs with different sizes, new nail kit for reshaping, polishing, smoothing, grinding, sharpening, carving gel nails or acrylic nails easily and quickly. Great nail tools for any professional manicurist or nail art beginner. Easy operation: The electric nail file has the button of "FWD-Forward" "REV-Reverse" function to change direction, for handpiece please rotate it from the white middle part, then the drill bits will be opened and then press the button white middle part, it will close the hole and will hold the bits tightly. Durable Nail Drill Tools: Suitable for your nails as well as artificial nails, great tools for any professional manicurist or beginner. All the drill bits are smooth and don’t heat up. Tungsten carbide material is not only antirust but also could protect from overheating damage with heat resistant. New Version Upgrade: Makartt have upgraded the drill bit set to ensure that it is good for removing various gels; The new version bit is made of new advanced materials, it can greatly protect your nails.