Made from a durable aluminium oxide. Ideal for finishing most materials. Can be used on most detail sanders with a hook and loop attachment. Punched holes for dust extraction. Come with coarse, medium, fine grades,widely used in the grinding and polishing of metal and non-metal, wood, rubber, leather, plastic, stone, glass and other materials. Medium Made of high quality alumina abrasive, the sandpaper is durable and antistatic, ideal for sanding and polishing hook and loop, easy and quick to stick, sturdy, durable and practical