The TowSmart Trailer Hitch Ball, Class II, 2in Ball, 3/4in x 1-1/2in Shank, 3500lb, 716, Chrome, 1 Each is a key component to create a secure connection between your vehicle and trailer when towing your valuable assets. The heavy-duty construction is extremely durable with a chrome plated finish that is corrosion resistant. The hitch ball provides wrench flats for easy positioning in the X-Mount lock rail system. The lock rail functions as a built-in wrench preventing hitch ball rotation during installation or removal. The wrench flat design is universal to be used with any standard ball mount.