1. VARIOUS FUNCTIONS: The coarse surface of the drill allows for quick removal of nail glue for cleaning, shaping, cutting, smoothing, and removal to meet your various needs. 2. LEFT AND RIGHT DIRECTION: The drill can be rotated to the right or left for a smooth CW and CCW cut, perfect for left and right hands without having to change other dimensions during work. 3. FOR WHOM: You will receive different styles of nail drill bits that fit most drill machines, suitable for most gel nails and for experienced manicurists or nail art beginners. 4. FAST AND EFFICIENT: Ceramic nail drill bits have reliable strength, high durability, low cutting performance, and less dust to reshape, polish, smooth, buff, carve, and even out gel nails quickly and well. 5. 40 PIECES IN TOTAL: The package contains a total of 40 pieces of nail ceramic grinding heads, enough for you to replace and use, very convenient.