Diamond Grinder Bits for Dremel-Tool Accessories, 20Pcs, 1/8Inch Shank, 120-Grit, Rotary Tool Bits for Stone Glass Resin 120-GRIT DIAMOND GRINDING BITS: Bit head surface is completely coated with fine diamond particles, with high grinding efficiency, high durability and stable quality, and safer to use. APPLICABLE SIZE: Equipped with 1/8inchs (3 mm) universal shank that is compatible with for Dremel and most rotary tools. Various shapes of bits meet different requirements, improve work efficiency, and save time and labor. MULTIPLE APPLICATIONS: These diamond drill bits are perfect for polishing stone, glass, ceramic, tile, brick, cleaning up around the edges of metal work, and grinding pottery drips so much easier. Great for DIY crafts, molding, home repairs (wood, some plastics, even dog nails). WHAT CAN YOU GET: 20 Diamond Drill Bits. Diamond Grinding Bits are designed in various shapes. Different designs and rich shapes will meet your different needs in angles and depths, thereby improving work efficiency. Note: When grinding, use light pressure. Excessive force will make it difficult to discharge the powder, affecting the grinding efficiency and easily damaging the drill bit. Adding water to cool the grinding process will be safer, and the service life of the drill bit will be longer. Color:As Shown Material:Emery + Metal Package Contents: 20 * Diamond Grinder Bit