Package Includes - Comes with 504 sanding bands, 24 sanding drum mandrels, 2 self-tightening drill chucks, and 1 combination wrench, a total of 531 pieces in 1 set. 7 Grit Essential Accessory - These sanding marks include 6 grits (80 grit, 120 grit, 150 grit, 240 grit, 320 grit, 400 grit, 600 grit) and 3 diameters (1/2 \", 3/8 \" and 1/4 \"). Each grit and size has 24 sanding bands for you to use and replace. Universal Drum Mandrels - 24 pieces of reusable drum mandrels include 3 diameters: 1/2 \", 3/8 \" and 1/4 \", 8 pieces for each size. Common and standard size suitable for all rotary tools such as Dremel, etc. Easy to Install - Make sure the drum is screwed on tightly, the drum mandrels with self-expanding rubber cushion, which makes the sanding bands fit tightly against the mandrel and provides a better finish; Note: Wear professional safety glasses to protect your eyes as there may be flying grit when the sanding drum rotates at high speed. Wide Compatibility - Standard and standard size drum sanding paper set widely used for smoothing surfaces and curved edges, suitable for polishing soft and hard materials, perfect for home improvement, artwork, woodworking, and other finishing and DIY work. 531 Pieces Sanding Drum Set for Dremel Rotary Tool Specifications Sanding Band Size: 1/2 inch, 3/8 inch and 1/4 inch Drum Mandrel Size: 1/2 inch, 3/8 inch and 1/4 inch Sanding Band Material: Aluminum Oxide Package Includes 80 Grit: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band Grit 120: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band 150 Grit: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band 240 Grit: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band 320 Grit: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band 400 Grit: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band 600 Grit: 24 * 1/2 inch Sanding Band 24 * 3/8 inch Sanding Band 24 * 1/4 inch Sanding Band 8 * 1/2 inch Drum Mandrels 8 * 3/8 inch Drum Mandrels 8 * 1/4 inch Drum Mandrels 1 * Self-tightening Collet (2.35mm) 1 * Self-tightening Collet (3.17mm) 1 * Combination Wrench Note Wear professional safety glasses to protect your eyes, as there may be flying grit when the sanding drum rotates at high speed. The sanding drum wears faster on metal surfaces, replace the sleeves in time for better sanding effect. Keep them out of reach of children. Note: Data is manual measurement, please allow an error of 1-133 cm, due to the differences between light and screen there will be a certain color difference, the specific received in kind shall prevail. 📦 Guaranteed Customer Service: If you have any problems, do not hesitate to contact us! Our customer service team is here to help you quickly ✅. 🚀 Fast Delivery: We process and ship your order as soon as possible 📬. However, due to exceptional circumstances (holidays, extreme weather, high demand, etc.) a slight delay may occur. In this case, we will keep you informed as soon as possible 📢💌. 💯 Quality Guarantee: Your satisfaction is our priority! We are committed to providing you with quality products for a worry-free purchase 💎. Thank you for your trust and support 💕. We look forward to providing you with an exceptional shopping experience! 🎁✨[XJ]