Aluminium Oxide fibre discs are tough and sharp, combined with a dense semi-rigid backing gives this product extremely long life. It is ideal for working on metal using an angle grinder. Use with FLV56835 backing pad, sold separately.1 x Pack of 3 Flexovit Aluminium Oxide Fibre Discs 115mm Medium 50GAdditional Information:• Diameter (mm): 115• Grit: 50G• Pack Qty.: 3