Norton Abrasives reducing bushings are used with flap & convolute wheels. They ensure a snug fit on small sized arbors to minimise wheel center holes. They feature aluminium construction for corrosion resistance & durability, and are integrated with contact washers to distribute the pressure of the nuts & prevent damage. These disposable bushings meet ANSI standards and have one piece flanges to assist in alignment & mounting of the bearings. Choose from a wide range of these bushings, available in arbor hole sizes up to 3 inches. They are sold in packs of 2 units.