CURT 40089 Raw Steel Trailer Hitch Ball, 30,000 lbs., 3 Inch Diameter Tow Ball with 2 Inch x 3 1 4 Inch Shank bike While a 5th wheel hitch 2055104 While a 5th wheel hitch does offer an impressive amount of towing strength non binding rods to be a true rolling unit Dual jaws provide 360 degree kingpin contact Three position coupling indicator is clearly visible from truck cab Self aligning head offers a wide opening for easy coupling Three grease fittings for easy lubrication Includes a polyethylene lube plate to eliminate messy grease deposits Tested for safety in accordance with SAE J2638 Protected by a highly durable carbide powder coat finish Limited lifetime warranty (one year finish industrial supplies The CURT 3" tow ball comes with a 2" shank diameter for added structural strength and a raw steel finish