I have JKS Quicker Disconnects on the rear of my XK. Basically a quick disconnect is a modified sway bar end link which easily disconnects by pulling a pin instead of having to unbolt the entire end link from the vehicle.

The swaybar (or anti-sway bar) helps stabilize the vehicle's body in relation to the suspension. It's attached to both chassis rails and connected to the axle housing using swaybar end links. The swaybar's spring steel construction allows it to resist vehicle body roll during cornering. On the road, the swaybar is critical to proper vehicle handling and control. Off-road, however, the swaybar counteracts the suspension's ability to function independently of the chassis, thus preventing the tires from maintaining contact with uneven terrain. Unless equipped with a locking differential, engine power is transferred to the tires without traction and the vehicle is unable to continue forward progress.