Bolt-on sway control adapter attaches to standard 2 inch ball mounts to provide a mounting point for friction sway controls. The ball mount platform must be 2-1/2" wide and have a 1" ball hole. The adapter is made of 3/8" thick material and mounts under the hitch ball. When installed, the shank length of the hitch ball must be long enough to allow at least two threads to be visible when the hitch ball is installed and the nut is completely tightened. A hitch ball with an extra long shank may be required.