Anti-Sway Bar Disconnects

 

They can be any mechanism that allows you to disconnect your anti-sway bar while off-road. 

 

When the anti-sway bar is connected the articulation of the front end is limited.  This is great for on the highway since it reduces the chance for rollover in high speed turns but not so good when off-roading when you want each side of the front axle to move up and down separately.