This 7pcs diamond-coated grinding bit is designed for versatility and durability, making it ideal for applications. Featuring high-hardness diamond particles, these bits deliver excellent performance for grinding, polishing, and finishing multiple materials. Suitable for materials such as metal, wood, jade, and stone. Ideal for rust removal, weld burr trimming, hole repair, and mold processing. High wear resistance ensures long lifespan and consistent results. Applications:Use this set for craft engraving, polishing rough edges, or repairing damaged surfaces. Each bit's allows you to adapt to different tasks, providing smooth and precise results.Compatible with most standard drills, these grinding bits are a must-have for professionals and DIY enthusiasts seeking reliable and efficient tools. Colour:Blue Material:Diamond Package Contents: 7pcs x diamond-coated grinding bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.