B&W Trailer Hitches Ball- 2-5/16 X 1-1/4 X 3-1/4 Model HB94003B&W Trailer Hitches Ball 2 5 16 X 1 1 4 X 3 1 4 Model HB94003 Your vehicle's ball mount is nothing without a trailer hitch ball in it! Once bolted in, a hitch ball creates a perfect pivot and attachment point for your trailer's coupler. We machine the hitch balls from carbon steel then heat treat them for maximum hardness. You can choose from our wide selection to get exactly what you need. Hitch ball provides connection point for your trailer's