Package includes 329 sanding bands in three diameters: 1/2", 3/8", and 1/4". Three pieces are provided per size for a total of 338 pieces. The kit features three different grits: 60, 120, and 320 to meet various polishing requirements. This kit is suitable for home decoration, artistic crafts, woodworking, carving, polishing, circular grinding, and metal polishing for derusting. It is compatible with all common size rotary tools like Dremel. A plastic storage box is included for convenient organization. Drum sanders are compatible with common and standard size rotary tools. They are easy to install, with rubber-cushioned self-expanding mandrels that hold sandpaper sleeves securely for fine artwork. Caution: Please wear protective eyewear when using this drum sander set. Specifications: Color: Red. Material: Oxide Aluminum. Turns your Dremel or other rotary tool into a versatile high-speed sander. Accessories for sanding, shaping, grooving and finishing soft and hard woods, fiberglass and more. Drum Chuck Sizes: 1/2 inch, 3/8 inch, and 1/4 inch. Grit: 60, 120, 320. Shank Diameter: 3.17mm. Weight: 267g. Package Included: 186 x 60 Grit sanding sleeves, 63 x 120 Grit sanding sleeves, 80 x 320 Grit sanding sleeves, 3 x 1/2" Mandrels, 3 x 1/4" Mandrels, 3 x 3/8" Mandrels.