The CURT Rebellion XD, No. 45949, is an adjustable cushion hitch ball mount designed to reduce jerking, jarring, rattling, vibration, and strain at the coupling point. It provides a smoother ride for the driver and passengers while minimizing the toll on the vehicle and its brakes and suspension. With its simple design and use of patented ShockDrop technology, it removes the hassle of an airbag, bearings, and the frequent maintenance required by other cushion hitch options, the company says.