Feature:1. Changing Roughness:The bit surface roughness changes from top to bottom to quickly remove nail gel, meet your various needs for cleaning, shaping, cutting, etc.2. Rotational: The bit can be rotated to the right or left for smooth clockwise and counterclockwise cuts, suitable for both left and right hands operation.3. 4 Types: Including 4pcs nail drill bits of the package, suitable for most electric nail drills, ideal for most nail gels and for experienced manicurists or beginners.4. Plastic Box: A matching box for protection and easy storage keeps these nail drill bits in order, easy to hold and carry, suitable for both professional salon and home use.5. Tungsten Carbide: Made of hard tungsten carbide with reliable strength, high durability, nail gels can be quickly removed and well reshaped, polished, polished, sculpted.Specification:Item Type: Nail Drill BitsMaterial: Tungsten CarbideQuantity: 4pcs.Package List:4 x Nail Drill Bits4 x Storage Box