Multi-grit sanding discs ----- 100 pieces per box, 5 different sandpaper assortments with up to fine sandpaper, 20 pieces 40/60/80/120 sanding discs/ 180 with Velcro to give you more options if needed. 125mm diameter 8 holes mixed grain, ideal for all 5 inch grinding machines. High quality ----- High quality aluminum oxide grinding wheel holders made from aluminum oxide abrasives with special heat treatment have excellent resistance to polishing, sharpness and wear. Durable and anti-static, great choice for sanding and polishing. 8 holes are designed for efficient dust suction. Easy to use ----- Velcro fastener, easy and quick to stick, strong and durable, will not fall off when 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 to remove rust, peeling paint, deburring and grinding points welding. Even the sand ----- resin