General Description This sanding kit contains 307 pieces, including 300 sanding sleeves and 6 drum mandrels for rotary tools, as well as a combination wrench. The sanding sleeves are available in three grit sizes (80, 120, 240) and three diameters (1/2\", 3/8\", 1/4\"). Each grit size and size comes with 30 pieces, providing great versatility for various sanding tasks. Technical Specifications Total number of parts: 307 Sanding sleeves: 300 pieces (30 pieces per grit size and size) Available grit sizes: 80, 120, 240 Sleeve diameters: 1/2\", 3/8\", 1/4\" Roll lengths: 38 mm, 40 mm, 42 mm Shank diameter: 2.35 mm and 3.17 mm Number of chucks: 6 pieces Compatibility and Accessories Compatible with all standard sanders, including Dremel sanding sleeves. Rubber sanding rollers in various sizes. Installation To attach the sanding sleeve, turn the screw in the sanding roller to enlarge the rubber part. Ensure the sleeve fits securely around the rubber part during operation. Usage Ideal for sanding, polishing, grinding, rust and paint removal. Suitable for materials such as ceramics, stone, glass, and wood. Recommended for home, craft, and carving projects.