The Reese Towpower carbon forged hitch ball has a patented hex design which allows for a one-wrench tightening system when used with a Reese Interlock ball mount It makes for installing the hitch ball more efficient, and prevents marring of the hitch ball It is not limited for use with the Interlock ball mount, and can be used with any standard ball mounts This carbon forged hitch ball has a loading capacity of 3500 lbs This hitch ball is compatible with 1-inch shank diameter that fits in 2 inches ball mounts and 2 inches shank length Reese brand has become a household name in the heavy-duty towing industry. With proven designs that exceed the industry standards, Reese has become the brand of choice when performance is the expectation.