Complete Types: Includes 110 sanding discs of different grits: 60/80/100/120/150/180/240/320/400/600/800, 10 pieces of each type. These 125mm discs with 8 holes grip the sander from the back. The aluminum oxide on the front is ideal for a smooth finish. The sanding discs meet almost all polishing requirements. High Quality: This sanding disc features a thick, D-class paper backing. The 125mm sanding disc is made of high-quality craft paper with a good layer of aluminum oxide. The high-quality alumina sandpaper sanding discs, made of alumina abrasive, with special heat treatment, offer excellent polishing, sharpening, and wear resistance. Durable and anti-static sanding discs, excellent choice for sanding and polishing. Easy to use: This 125mm sanding disc has a high-strength resin bond system that increases durability,Durable reverse Velcro makes changing sanding discs easier and more convenient; hook-and-loop backing for quicker assembly, quick and easy to attach, strong and durable,