CURT RockerBall Starter Kit - 5" Drop [45144]RockerBall Starter Kit 5" Drop The CURT RockerBall cushion hitch provides improved comfort and enhanced control while towing, featuring our unique ShockDrop technology. An integrated cushion isolator allows the hitch ball to turn the standard ball mount into a cushion hitch with anti rattle capabilities. The RockerBall ball mount kit is a shock absorbing hitch accessory that dynamically reduces jerking and jarring while towing. As your trailer passes