1、Application: Straight trailer coupler fits 2in diameter round tube straight trailer tongue and 2in trailer ball, suitable for towing RV, Boat, Camper. 2、Secure Lock: This straight tongue trailer coupler has an easy lock latching system, which is more convenient to lock, simpe opeartion. 3、Easily Adjustable: Equipped with a posi lock locking spring and adjustable nut inside, the coupler is easy to adjust to ensure a snug fit on the trailer ball. 4、Hole Design: 2in straight trailer coupler features holes to accept a safety pin or coupler lock, the maximum load capacity is about 800KG / 1764LBS. 5、High Strength: Straight tongue trailer coupler is made of heavy duty forged steel, with zinc finish, rustproof and sturdy. Strong riveted tongue lock with spring release.