Made from lightweight extruded aluminum, these Rim Savers protect the rim of a marching bass drum in two ways: first, the Rim Saver comes with button head Allen key screws that allow a rim to be protected from mallet hits and clicks. Rugged construction with contoured strike zone provides the perfect sound without damaging the mallet or the rim. Second, the screw and nut combination are provided in the case where a rim has fractured or broken.