CURT 25210 Black A-Frame Trailer Coupler, 2-Inch Hitch Ball, 5,000 lbs. When replacing a broken coupler on your traileror installing a new one on a trailer use a dependable couplers you can trust. Keep your tow load latched on tight. Selecting the right trailer hitch, ball mount and trailer ball to manage the weight of your trailer is not the only important aspect of towing; you also need a trailer that can stand up to the road ahead. That means equipping it with a coupler that is built to go the distance. This A-frame couplers are meant to mount onto trailers with an A-shaped tongue. They are stronger than straight-tongue couplers and are especially common on RV trailers. This particular A-frame coupler features a Posi-Lock latch to be easy to operate and quick to adjust, using a simple bolt within the latch mechanism. It is made from hardy steel construction and has a durable gloss black finish to protect from corrosion, wear and tear.