Eaz-Lift's Anti-Rattle Device for Hitches helps prevent hitch movement and noise. This provides a quieter, smoother ride. It is ideal for bike racks, hitch racks, cargo carriers, spare tire mounts, trailer ball mounts and more. The anti-rattle device is compatible with 2-inch shanks and can be used with hitch classes 1, 2, 3 and 4. Product includes (1) wedge plate, (1) U-bolt and (2) flanged lock nuts. The wedge plate is constructed of durable powder-coated steel and the U-bolt is constructed of zinc-plated steel. Measures 4-inches x 4-inches x 4 7/16-inches.