The Baja Collection Chrome Trailer Hitch Ball fits directly into your trailer coupler and helps create a secure connection between your vehicle and trailer when towing your valuable cargo. The hitch ball provides universally designed wrench flats that can be used with any standard hitch ball mount and also fit into the TowSmart X-Mount ball mount lockrail system. The hitch ball includes a locking washer, mounting nut and wrench flats. Made of durable, heavy duty steel construction with a matte black finish that is corrosion-resistant to withstand extreme weather. To select the correct class it is important to know the total weight of your trailer and its contents, and that you do not exceed the recommended maximum towing capacity determined by your vehicle maufacturer.