The 2" x 2" receiver tube opening of this class 3 hitch is able to accept a hitch-mounted accessory, such as a bike rack or cargo carrier, or a ball mount to tow most standard size trailers, including utility trailers, single-horse livestock trailers, boat trailers and large campers. One special feature about the class 3 that is not found in classes 1 or 2 is its compatibility with a weight distribution hitch. When used in combination with a WD hitch, this class 3''s gross trailer weight capacity increases to 5,000 lbs. and the tongue weight capacity to 500 lbs. (NOTE: Never exceed the lowest weight capacity of any towing component).