These 50mm wet and dry sanding discs are made from aluminium oxide that is specially treated with an anti-clogging stearate coating. The backing material is polyester film with a high flat surface and strength making it ideal for wet or dry sanding. Semi-open coating provides an aggressive cut and minimises dust. The hook and loop backing offers decent adhesion to facilitate the fast changing of sanding discs. These discs provide a perfect finish at high speed very efficiently and are specially-designed for contoured surfaces. Ideal for use in the automotive paint and body repair industry. Also, sanding and finishing wood, metal including ferrous alloys, painted surfaces, primer, varnish, plastic and fillers.