This replacement ball and pintle combination head offers versatile towing options and is designed to fit any CURT adjustable channel mount shank. It features a standard 2" diameter trailer ball to fit any 2" trailer coupler. With its integrated spring-loaded arm, the ball-pintle combination can also be coupled to a 2-1/2" or 3" lunette ring (inside diameter). The entire head securely attaches to any CURT adjustable channel mount shank. NOTE: Includes pintle attachment only. Channel mount sold separately.-Spring loaded clip chain is included with combo