The Shape It Up Carbide Milling Bit Purple Rounded Volcano Cone 2-Way Coarse Green is a carbide milling bit in a rounded cone shape. If you are looking for the best milling bit that can remove any nail system, then this is the milling bit for you! The special purple coating is exceptionally good, resistant to heat, low vibration, low noise, and has wear-resistant properties. The special three-layer purple coating also acts as armor to last a long time in your milling bit kit, made from the hardest metal, tungsten. In short, razor-sharp with high durability, what more could you want? This Shape It Up milling bit quickly removes old nail product, smooths the nail surface nicely, and works well along the side walls of the cuticles. You can also use this milling bit to shorten or shape nails. This volcano cone milling bit can be used by both right-handed and left-handed users and has a green grit, which indicates a coarse grit. The coarse grit is suitable for removing hard builder gel, BIAB, acrygel, and all types of acrylic. 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.