120-GRIT DIAMOND GRINDING BITS: Bit head is completely coated with fine diamond particles, with high grinding efficiency, high durability and stable quality, and to use. APPLICABLE SIZE: Equipped with 1/8inchs (3 mm) universal shank that is compatible with for 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 shapes. Different designs and rich shapes meet your different needs in angles and depths, thereby improving work efficiency. Note: When grinding, use light pressure. Excessive force difficult to discharge the powder, affecting the grinding efficiency and easily damaging the drill bit. Adding water to cool the grinding process be , and the service life of the drill bit be longer. Color:As Shown Material:Emery + Metal Package Contents: 20 * Diamond Grinder 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.