CURT 15445 Xtra Duty Class 5 Trailer Hitch, 2 Inch Receiver, Select Ford F 350, F 450, F 550 Super Duty 2 1 2" Shank 6" Rapid Hitch WDTW) Engineered with a vehicle specific corners WDTW) Engineered with a vehicle specific design for a custom fit Tested for safety in accordance with SAE J684 Precisely welded for superior strength and fit Protected by a durable high gloss black powder coat finish Co cured in a rust resistant liquid Bonderite coating bike rack or other accessory It features a 2" x 2" receiver tube opening to accept a ball mount or hitch mounted accessory CURT class 5 Xtra Duty hitches begin a class of their own