Fibre backed sanding discs are used on backing pads and we stock a full range of sizes and hardnesses. Aluminium oxide abrasive is the lowest cost choice for mild steel, although zirconium abrasive is most popular due to much longer service life and ability to grind stainless steel. Ceramic abrasive offers another level again in terms of durability and speed of grinding. Surface conditioning discs provide a quick means of cleaning metal, removing light coatings and leaving bright finishes.