A line of cotton fiber quick change abrasive disc kits that provide an assortment of grit sizes and a choice of diameters and holder styles is available from Rex-Cut Products Inc. Rex-Cut cotton fiber quick change disc kits contain eight 2- or 3-inch dia. discs, in an assortment of grit sizes, with either type-R or -S fasteners. Featuring layers of non-woven cotton fiber that are impregnated with aluminum oxide abrasives and pressed together, the discs constantly reveal fresh abrasives, resulting in smooth controlled grinding. The discs will not smear stainless steel and other hard materials and are non-loading on aluminum and composites. They run cool and last up to 25 times longer than coated nylon discs, claims the firm.