MaterialHigh hardness ceramic material stronger tougher than carbide bits antibacterial no clogging resistance of acid alkali and heat Design Dome round top and square top to to easily reach small and tight areas without scratching nailsIntersectant stripes of the drill head can help you polish and reshape your nails Easy to use Easy to clean and disinfect wash the bits through clean water directly and simply disinfect through alcohol Application Suitable for nail salon nail art school college nail art artist personal use etc ReliableSuper Fine Fine Medium Coarse Grit ceramic nail bits for Nail Art and Remove dead skin for finger nails and toe nailsBetter heat disspationwont be burning hot during longtime using