Package Includes - 329 pieces of sanding bands in 3 diameters: 1/2", 3/8" and 1/4"3 diameters: 1/2", 3/8" and 1/4", 3 pieces per size; 338 pieces in total Different Grit Sanding - 60 grit.120 grit, 320grit.Almost all polishing requirements are met Applicable - This kit is suitable for home decoration, artistic crafts and woodworking, carving, polishing, circular grinding, metal polishing, polishing for derusting, etc Large Compatible - Compatible with all common size rotary tools, like Dremel, etc. Easy to Store - With a plastic box, convenient to store and fetch; which allows you to store everything properly after using it 338Pcs Drum Sander with Plastic Box 1.Drum sanders are compatible with common and standard size rotary tools 2.Easy to install, drum mandrels rubber-cushioned self-expanding pads can hug sanding belts with a snug fit, holding sandpaper sleeves in place for extra-fine artwork 3. Caution: Please wear protective eyewear when using of this drum sander set 4. If you have any questions about the product, please feel free to contact us, we will offer our best help to solve the problem immediately Specifications - Color: Red - Material: Oxide Aluminum - Turn 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 Chucks Size: 1/2 inch, 3/8 inch and 1/4 inch - Grit (Abrasive Sleeve): 60/120/320 - Shank Diameter: 3.17mm - Weight: 267g Package Included: 186 x 60 Grit"sanding sleeve 63 x 120 Grit"sanding sleeve 80 x 320 Grit"sanding sleeve 3 x 1/2" Mandrels 3 x 1/4" Mandrels 3 x 3/8" Mandrels