About This Item Quantity & Convenience Set - Package Include 200pcs Sanding Disc Pads, 10 Grit, 20 Pieces For Each Grit: 80/180/240/320/400/600/800/1000/2000/3000; 1pc 1/4 "rod holder pad and 1pc soft foam pad, large quantity to meet your various polishing needs Upper material - made from aluminum oxide abrasive, durable and anti-static, useful for cleaning and corner polishing, such as polished metal, wood, jade etc Soft foam pad pad - sanding disc kit includes pad 1pc soft foam shock absorber, great for reducing shaking when using, please make sure the soft foam pad is properly connected to sanding discs and backing pad Hook and back buckle - the diameter of the buckle sanding pad is 50mm, fits most rotary tools, such as die grinders, pneumatic grinders, electric drills, etc Warm note: These disc pads sanding pad fit a 50 mm backing, they do not fit the sanding backing for adhesive sticker sif Please clean off the dust and replace the old sanding pad before using them