Buyers Products ball mount with tubular shank fits 2 1/2in. receiver tubes. Sturdy welded steel construction. Tongue accepts 1 1/4in. dia. shank towing balls. Ball Diameter Hole (in.): 1 1/4, Shank Length (in.): 10, Gross Vehicle Weight Rated (lbs.): 12,000, Weight Capacity (lbs.): 1,200 2 1/2in. x 10in.L tubular shank 5in. drop Two-piece welded steel with black powder-coat finish 12,000 lbs. max. gross trailer weight 1200 lbs. max. vertical load