The Dual Cam™ II continually works to ensure the highest level of towing safety. The stronger the sway force, the more the Dual Cam System works to stop it. The newly redesigned Dual Cam™ II system is now easier than ever to install and offers even broader application coverage to work with the most popular trailer frames. Kit includes trunnion bars, cam mounts, dual cams, and a pre-torqued 2-5/16" hitch ball plus all hardware needed for installation.Includes: Fully automatic, active sway control system forces trailer to stay straight behind tow vehicle No Drill installation No need to relocate items on top of A-Frame to install Dual Cam™ II Sway Control Simple installation and adjustment Hooking up spring bars automatically hooks up sway control No U-bolts to interfere with bottle racks or another A-Frame mounted items Limited lifetime warranty Limited lifetime warranty