30Pcs/Set Diamond Point Burr Bits Drill Head Accessories Dremel Needle Tip Alloy Grinding Cylindrical Ball 3.0mm Shanks Features: All Burrs with 1/8" Shank. Different shapes include: ball, cone, cylinder, needle point and tapered. It is compatible with most grinders or rotary tools. Universal set for multiple projects with grits 120-150.Used for grinding and carving tiles, glass, marble, gemstones, slates, etc. Highly recommended for crafts, home repair, jewelry, lapidary use, modeling and much more. Specification: Shank Diameter: 1/8" Shapes include: ball, cone, cylinder, needle point and tapered. Box Color: Black/Transparent (Random) Package Included: 30pcs Diamond Grinding HeadNote: Due to the light and screen difference, the item's color may be slightly different from the pictures. If you have any questions, you can via trademanager or message, we will always be here and answer all your questions at the first time.