Material: The nail drill bits made of tungsten alloy steel, sharp and wear-resistant, durable and easy to use; Fashionable style, portable and lightweight for personal and family use anytime and anywhere. Versatile: The nail file drill bits, sharp, sturdy and easy to use, you can easily sharpen, grind, clean, trim, smooth, polish and reshape your gel. Suitable for manicure, pedicure and remove gel nail or dead skin to get the perfect nail shape. Easy to Use: They are suitable for natural nails as well as artificial nails, great tools for any professional or beginner manicurist. Even if you are using it for the first time, it is easy to use, but please be sure to move gently when using it. Different Shapes: They come in different shapes and sizes, meeting many kinds of needs. Contains ball shape tip, pointed cone tip, micro ball tip, flat end cylinder tip, etc. Premium quality nail drill bit set suitable for most electric manicure nail drill bits. A set of professional grinding heads for home and salon use. Note: The data is manual measurement, please allow 1-48cm error, due to differences between the light and screen, there will be a certain color difference, the specific received in kind prevail.