Specifications: They are made of heat resistant and corrosion resistant material with no rust or clogging. It is great for grinding, polishing, unloading, exfoliating, engraving radian and so on. Grinding bit is designed for the removal of gel and acrylic panels with high efficiency. Type: Nail Drill Bit Material: Tungsten Steel Alloy Features: Manicure Tool, Easy to Install, Nail Polishing Handle Length: 2.35cm/0.93" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 10 x Nail Drill Bits