Package Includes - 329 pieces of sanding bands in 3 diameters: 1/2", 3/8" and 1/4"338 pieces in total Different Grit Sanding - 80 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; whichever you allows you to store everything properly after using it 338Pcs Drum Sander with Plastic Box 1.The drum sanders are compatible with common and standard size rotary tools</ 2.Easy to install, self-expanding rubber-cushioned drum chucks can hug sanding belts with a snug, maintainable fit. holding the sandpaper sleeves in place for extra fine artwork 3. Attention: Please wear protective glasses when using this drum sander set Specifications - Color:Red - Material: Aluminum Oxide - 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 Core Size: 1/2 inch, 3/8 inch and 1/4 inch - Grit (abrasive sleeve): 80/120/320 Package Included: 329 x Abrasive Sleeve 3 x 1/2" Mandrels 3 x 1 /4" Mandrels 3 x 3/8" Mandrels