Interchangeable for various uses, rotates forward and backward. Functions include shaping, nail polish removal, dead skin removal, and radius carving. Convenient and easy to use. Meets the needs of various nail art applications. Can be used for manicures, nail polishing, and grinding. Tungsten steel nail drill bits are perfect for professional tasks like engraving, grinding, sharpening, and polishing. The universal 2.35mm nail drill bit shank diameter fits most nail drill machines on the market. Made from high-quality tungsten steel, safe, wear-resistant, and durable. Suitable for home use and nail salons. Item Type: Nail Drill Bit Set Model: C, 3XC Specification: 2pcs/set Material: Tungsten Steel Shank Diameter: Approx. 2.35mm / 0.1in Functions: Manicure, nail polishing, nail salon, foot care, pedicure, nail polish removal, etc. Application: Home, nail salon, etc. Size: As shown in the pictures Includes: 1 x Conical Nail Drill Bit, 1 x Flat Nail Drill Bit