A ball mount is a receiver hitch accessory comprised of a shank and a trailer ball platform. The shank inserts into the hitch receiver tube, while the platform provides a solid mounting point for a trailer ball.
Ball mounts come in a variety of styles and capacities. Some are fixed, made up of a single piece. Others are adjustable. Virtually all ball mounts come with a hole in the shank to accept a hitch pin or hitch lock.
Below is a ball mount without the ball loaded onto the mount.