Multi-grit Sanding Discs ----- 100 pieces per box, 5 different sets of sandpaper with sandpaper up to fine, 20 sanding discs 40/60/80/120/180 with Velcro to give you more options if needed. 8-hole mixed grit with 125mm diameter, ideal for all 5-inch grinders. High quality ----- High-quality aluminum oxide grinding wheel backings made of aluminum oxide abrasives with special heat treatment have excellent polishing resistance, sharpness and wear resistance. Durable and anti-static, excellent choice for sanding and polishing. 8 holes are designed for efficient dust extraction. Easy to use ----- Velcro closure, easy and quick to stick, strong and durable, will not fall off once installed, easy to install and remove. Widely used ----- Mainly used in grinding, polishing, etc. wood, plastic, stone, glass and other materials, metallic and non-metallic materials with various complex profiles for removing rust, peeling paint, deburring and grinding weld points. . Even sand resin bond system