Complete Types: Include 100pcs sanding disc of different grits: 40/60/80/100/120/180/240/320/400/800, 10pcs of each type. Almost all polishing requirements are met. : Sanding disc is equipped with a thick D-class paper base, made of alumina with abrasion resistant sand , the high-strength resin bonding system increases the service life. Easy to change: The durable reverse paste surface makes changing the sanding disc easier and more convenient. Applicable Operation: Suitable for grinding and polishing metal, non-metal, wood, rubber, leather, plastics, stone, glass and other materials. Very practical and you can order according to your needs Suitable for random orbital sander: 150 mm, pre-punched with 6 holes for dust extraction, strong and durable. Professional grade random orbit sander sandpaper.