Makartt Cuticle Nail Bit: Grit: Fine - F with needle smooth top for nail prep. The bi-directional rotation function is uniquely designed to allow the carbide drill bit to cut smoothly in both clockwise and counterclockwise directions, preventing your hands from getting hurt. | Two-Ways Rotation Design Nail Bit: The bidirectional rotation function is uniquely designed to allow the carbide drill bit to cut smoothly in both clockwise and counterclockwise directions, preventing your hands from being injured.Perfect for nail lovers and professional use. | Cleaner Nail Drill Tip Bits: Special design from Makartt for cuticle cleaning, sidewall dead skin removal, and nail preparation. Gently and effectively clean the cuticle and dead skin around without tearing the skin before nail art design and nail care after removing nail gel. | High-Quality Tungsten Carbide Bit for Nails: Made of premium strength tungsten carbide material with precision workmanship, this high-precision machining nail bit comes with excellent heat dissipation, low vibration, low noise, and long service life. Perfect manicure preparation tool for nail salons and professional nail techs. | Warm Tips: Please don't use any Tungsten Carbide nail drill bits which have already been dropped or damaged to prevent injury during use it.Cleaning the carbide drill bits prevents them from becoming dull, ensuring long-term use.