It is completely coated with fine diamond particles. The Alumina oxide cut off discs are thin and . All discs with high cutting efficiency, high durability, stable quality, etc. Equipped with 1/8inchs (3 mm) universal shank that is compatible with for and most rotary tools. various shapes bits meet more different requirements, improve work efficiency and save-off time and labor. They are suitable for most rotary, die grinders and air tools. Designed for rotary tools. Turn your for or other rotary tool into high-speed cut-off saw & grinding machine These diamond drill bits are perfect for polishing stone, glass, ceramic, tile, brick, and rock. Great for DIY crafts, molding, home repairs (wood, some plastics, even dog nails). These diamond wheels are great for cutting, sawing, engraving, grinding, and filing hard materials. 10 Diamond Cutting Wheels, 2 Spindles, 20 Diamond Drill Bits. Diamond grinding heads are designed in shapes. Different designs and rich shapes meet your different needs in angles and depths, thereby improving work efficiency. Color: As Shown Material: Metal Package Contents: 1set x Diamond Cutting Wheels 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.