Strong Adhon:Thickened Hook and loop sandpaper back to stick well to the random orbital sander, double the adhon of ordinary sanding dics sandpaper. Durable and Last Longer:Sanding disc made from Premium aluminum oxide abrasive, Advanced sandpaper production standards, so our sandpaper is more durable, one piece is equivalent to three pieces of ordinary sandpaper effect. 100 Pack Classic PackageDgned according to the requirements of most customers:10 Pcs of 60 grit, 240 grit, 320 grit and 400 grit 20 Pcs of 80 grit, 120 grit and 180 grit sandpaper assortment from coarse to fine to satisfy almost all your general grinding and polishing requirements. Compatible and Application Widely:Sanding disc works with grinding and finishing on metal and non-metal, wood, rubber, leather, plastic, stone, glass and other materials.Widely Compatible and Suit for mostly orbital sanders with 8 holes and 5inch in diamater. High-quality Polishing and Grinding Effect: Uniform grit, fine workmanship, long-lasting durability, Open-coat produces an even and consistent scratch pattern and perfect cleaning and polishing effects.