PREMIUM QUALITY : These are made of aluminium oxide abrasive. Durable, abrasion resistance and anti-static that is ideal for polished metal, wood, jade, furniture during high speed sanding. Anti-clog coating with premium aluminum oxide abrasive and helps achieve an optimal sandingGOOD SANDING EFFECT : Durable aluminum oxide abrasive offers faster cutting and stearate coating that resists clogging; premium Resin on resin bond system for heat resistance gives smooth finish.EASY TO USE: The hoop and loop backing makes it easy to install and remove and the 5 inches size with 8 pre-punched holes fit for most 5 Inch sanding machineVARIOUS GRITS : Premium package includes 60 sheets of sandpaper in 5 different grits: 1000/1200/1500/2000/3000 (12 pieces each grit). Assorted grits from coarse to fine to satisfy your various polishing requirements with good sanding effectBROAD SCOPE OF APPLICATION : These sanding discs can be used professionals and home conditions in automotive, woodworking, industrial spheres. Mainly applicable to beads, wooden bead polishing, Burnish walls, furniture, cars, boats and other industry of metallic and non-metallic materials, in addition to grinding burrs, solder joint