In order to equip your vehicle with a full sway control system a mounting point for the sway control bar must be attached to the hitch. With the BulletProof Sway Control Ball Mount you can mount a sway control system between your hitch and your trailer. This is useful in reducing sway on large, heavy loads. The Sway Control Ball mount comes with a 2" and 2 5/16" combination ball and two side plates for mounting the sway control ball. This allows you to attach the sway control system to either side of the trailer. Typically, this setup would only have one side plate for mounting, which may not work for some applications. Having two ball sizes and mounting plates means the user can easily switch trailers and even change which side they would like to mount the sway control system on. This can be especially important for trailers that have designs that can interfere with the articulation of the sway control system. The ball mount is rated to 14,000 lbs. and can be used on our Medium Duty Duty hitches. It comes coated with our durable textured black powder coat and carries a lifetime warranty! Note: Sway Control Bar seen in photos NOT included.