Features: brand new and high quality Adopt the highest precision standards diamond with superior strength, sharpness, and durability. You can be sure that the drill bit set for nails will last for a long for time. It is not just useful for drilling but also for polishing. You can easily use it for cleaning cuticles and acrylic, refining and shaping nail edges, and removing dead skin. Ensures that you can get the kind of finish in the nail Art which you want. The mandrels rods of these replaceable grinding bits are made of solid metal materials, which are stable and easy to insert into the bit and maintain stability, and have heat dissipation and corrosion resistance properties, which can be used reliably for a long for time. These replaceable nail drill bits is not only useful for women and girls who like to do nail art and nail care at home, but also a necessary professional tool for nail salons, beauty shops, spas. We provide a universal size that is for almost all manicure nail drill machines,which are helpful tools for polishing nails, for professional studio use or home use. Specifications: Material:Tungsten steel+Alloy Size:Drill Part:Approx.0.4x1.25cm/0.16x0.49in Smooth Stick:Approx.3.8cm/1.5in Color:As Picture Shown Note: 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: 1 Piece Nail Drill Bits