Multiple Grit Sanding Discs ----- 5 different assortments of sandpaper with sandpaper up to fine, 20pcs 40/60/80/120/180 sanding discs with Velcro to give you more options if needed. 125mm diameter 8 holes mixed grit, 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 fastener, 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, flaking paint, deburring and grinding weld points. Even the sand----resin bond system provides