Buyers Products ball mount fits 1 1/4in. square receivers (Class I and II). Solid steel construction with corrosion-resistant black powder-coat finish. Accepts towing balls with 3/4in. dia. shank. 3500-lb. maximum towing weight; 300-lb. maximum vertical load. Fits Receivers (in.): 1 1/4, Gross Towing Weight (lbs.): 3,500, Length from Center of Pin Hole to Center of Ball Hole (in.): 7, Hitch Pin Included: No, Drop (in.): 2 1/2, Tongue Weight (lbs.): 300, Ball Diameter Hole (in.): 3/4, Ball Mount Material: Solid steel