Quantity Set & Practical - Package includes 200pcs sanding disc pads, 10 grits, 20pcs for each grit: 80/180/240/320/400/600/800/1000/2000/3000; 1pc 1/4" shank backing pad and 1pc soft foam pad, large quantity to meet your different polishing needs Superior Material - Made from aluminum oxide abrasive, durable and anti-static, useful for corner cleaning and polishing, such as polished metal, wood, jade, etc. Soft Foam Buffering Pad - The sanding discs kit includes 1pc soft foam damping pad, great for reducing shaking when using, please make sure the soft foam buffer pad is properly connected to the sanding discs and backing pad Hook & Loop Back - The diameter of the loop sanding pad is 50mm, suitable for most rotary tools, such as die grinders, air grinders, electric drills, etc. Warm Note: These sanding disc pads match a backing pad of 50mm, they are not suitable for adhesive sticker sanding pad. Please clean the dust and replace the old sanding pad before using them