The Shape It Up Carbide Safety Milling Bit Large Cylinder Smooth Flat Top Medium Blue is a carbide milling bit and features a large cylinder shape with a smooth top at the top of the head. The smooth head allows you to mill safely without damaging cuticles or skin. The smooth top also allows you to work faster with a calm and confident feeling. This is the best carbide milling bit for a beginner or a starter who wants to mill nails electrically. This carbide milling bit is also called a cylindrical safety milling bit. The special three-layer blue coating offers very high quality; the coating is wear-resistant and ensures a longer lifespan, making the carbide milling bit very robust. This large cylindrical ceramic milling bit is suitable for milling large nail surfaces, for refilling the nail, shortening a nail, and for creating a crisp smile line. This milling bit is for left-handed and right-handed use and has a medium grit. The medium grit is a medium coarse grit and is suitable for removing flexible builder gel, BIAB, and acrygel. Set your electric nail file between 25,000 and 35,000 RPM when using this carbide milling bit. Shape It Up carbide milling bits are easy to clean with a brass or nylon brush, and you can soak the bit in Klear Sanifiner, Klear 70% Alcohol, or the special hygienic spray Klear Tools and Surfaces to kill viruses and bacteria.