This particular 2-5/16" trailer ball offers a ball capacity of 15,000 lbs. It features a 1-1/4" shank diameter, a 2-5/8" shank length and a nickel-chrome finish to protect against rust and scratches. With its fine-threaded shank, this 2-5/16" trailer ball also offers an added measure of holding strength and provides smooth installation and torqueing. To give you peace of mind while towing to that next destination, we also carefully test our trailer balls and ensure that each one meets U.S. VESC specifications.