CURT Stainless Steel Trailer Hitch Ball, 10,000 lbs, 2-Inch Diameter, 1-1/4 x 2-5/8-Inch Shank Model 40056CURT Stainless Steel Trailer Hitch Ball, 10,000 lbs, 2 Inch Diameter, 1 1 4 x 2 5 8 Inch Shank Model 40056 CURT 2" trailer hitch balls are constructed from quality steel and are made with precision to fit your 2" trailer coupler like a hand in a glove. They are able to tow most standard duty and heavy duty trailers. These tow balls are an excellent extension of your class 3 or class 4 trailer hitch and ball mount, and are the ideal choice for most