Zinc-finished couplers offer a quick-lock ball clamp assembly that is factory adjusted to the ball size and provides a precise fit for safer towing. Trigger-action release allows for quick hitching/unhitching. Coupler for 1 7/8" ball has 2"W tongue and a 2,000 lb. capacity Coupler for 2" ball has 3"W tongue and a 3,500 lb. capacity