Atoplee 30pcs Diamond Burr Drill Bits 3mm Shank Tip Grinding Diamond Burr Rotary Tool Highly recommended for jewelers, lapidary use, hobbies, crafts, craft modeling, home repair. Ideal for wood, glass, plastic, metal, stone, tile, ceramics and more. Great for carving, etching, grinding, sanding, etc. If you're a DIY enthusiast or hobby and craft fan give your rotary tool even more functionality with this set of diamond burrs. Our products are quality assured according to the advanced technology applied and strictly control the quality of raw materials.