Curt 45675 Multi-Ball Mount With Hook 2 Inch Solid ShankCurt 45675 Multi Ball Mount With Hook 2 Inch Solid Shank 1 7 8 Inch, 2 Inch, 2 5 16 Inch balls. Features three welded trailer balls and a tow hook on a solid shank Allows for quick switching between trailer ball sizes Tow hook perfect for vehicle recovery towing applications Mounts on trailer hitches with a 2" x 2" receiver tube opening Fits 1 7 8", 2" or 2 5 16" couplers Tow hook limited to trailer hitch capacity Permanently attached trailer balls