It is coated with fine diamond particles. The aluminum oxide cut-off discs are thin and sharp. All discs offer high cutting efficiency, high durability, and stable quality. Equipped with a 1/8-inch (3 mm) universal shank compatible with Dremel and most rotary tools. Various bit shapes meet different application requirements, improving work efficiency and saving time and effort. Suitable for most rotary tools, die grinders, and air tools. Designed for use with Dremel rotary tools. Converts your Dremel or other rotary tool into a high-speed cut-off saw and grinding tool. These diamond drill bits are ideal for polishing stone, glass, ceramic, tile, brick, and rock. Suitable for DIY crafts, modeling, and home repairs (wood, some plastics, and pet nail trimming). These diamond wheels are effective for cutting, sawing, engraving, grinding, and filing hard materials. Includes: 10 diamond cutting wheels, 2 spindles, 20 diamond drill bits. Diamond grinding heads are available in multiple shapes. Different designs and shapes accommodate various angles and depths, enhancing work efficiency. Color: As shown Material: Metal Package Contents: 1 set of diamond cutting wheels