CURT 40047 RockerBall Cushion Hitch Trailer Ball, 7,500 lbs, 2 Inch Diameter, 1 Inch Shank balls While many weight distribution hitches GH 1724 While many weight distribution hitches are made to be compatible with a sway control attachment The wheel chock lock can be used on your trailer or automotive vehicle such as a car The CURT RockerBall trailer ball is a cushion hitch ball that dynamically absorbs jerking and jarring from your trailer at the coupling point Dynamic trailer ball featuring ShockDrop technology Dampens jerking and jarring from bumps and potholes for smoother towing Cushioned isolators reduce rattling and vibration for a more comfortable ride Reduces shock loads to the vehicle during sudden braking or acceleration Minimizes stress on tow vehicle's suspension and brakes for extended longevity Retrofits onto most existing ball mounts to improve current towing experience Virtually maintenance free with no airbag or bearings to service Grease zerk fitting provides easy lubrication Anti swivel base fits 2 1 2" wide ball mount tongues with 1" diameter hole Forged steel construction for dependable towing power Durable carbide black powder coat finish on base and chrome plating on ball Standard trailer ball diameter fits 2" couplers Rated for 7