The Campagnolo brake mounting washer is a serrated washer designed to prevent calipers from losing their alignment during use. If you're changing frames, upgrading, or just doing a seasonal tear-down, chances are you'll need a set of these when you re-mount your brakeset. These washers prevent your brakes from swaying from side to side, keeping them tightly held against your frame or fork. Can be used with Campagnolo, Shimano, Sram, Tektro, or any other brake system. Sold Individually.