Ceramic Nail Drill Bits Advantages: Higher Hardness: higher hardness than metal for increased lifespan. Easy To Clean and Disinfect: wash with clean water directly, then simply disinfect through medicinal alcohol. Great Antibacterial Feature: inorganic antibacterial agent added during the production process, persistently inhibit and kill bacteria and other microorganisms. The resistance of Acid, Alkali: ceramic is constituted by silicate, which is more stable chemical properties to resist acid, alkali and other caustic material. Best Universality: 2.35mm (3/32 inch) shank diameter fit for most electric manicure machine on the market. Professional USA High-Quality Ceramic White Barrel Bit Nail Drill Ceramic material has excellent heat dissipation, so the bits won't be burning hot during long-time using. Suitable for manicure and pedicure use etc. Available Grit: Fine Medium COARSE