Expert Quality, 115mm Aluminium Oxide tapered flap discs, ideal for grinding and finishing ferrous or non - ferrous metals. Manufactured from 72 leafs of fibre backed abrasive sheet, which is securely fixed to a reinforced backing disc with a chrome plated metal centre with a 22.2mm bore. Achieves a longer life when compared to resin fibre discs. Manufactured to BS EN 12413 Specifications