Everything you need - including 4 different grit types from coarse to fine: 40# 60# 80# 120# , 10 sheets for each grit, total 40 sheets which can satisfy almost all your polishing needs GeneralPremium Quality - Sanding sheets are made of high quality aluminum granules and high strength resin to prevent pilling, mouse sander sandpaper is anti-static and anti-blocking, good choice for sanding and polishing.Grain Mark - Each sandpaper measures approximately 93 x 185mm; with a grit mark on the back, the smaller the number, the coarser the polishing effect, the larger the number, the finer the polishing effect; please choose to use according to your needs.Backing - With hook-and-loop sanding sheets on the back, the sanding sheets are easy to stick to detail sanders quickly, pre-punched with 8 holes for sanding dust.Wide Application - Sanding pads are widely used for wiping rust off metal surfaces and polishing or grinding non-metal objects, such as plastic, wood, rubber, leather , glass, stone and more.