CURT Replacement Double Lock Gooseneck Ball, 30,000 lbs, 2-5/16-Inch Diameter Model 60616CURT Replacement Double Lock Gooseneck Ball, 30,000 lbs, 2 5 16 Inch Diameter Model 60616 A CURT gooseneck hitch is more than a necessary tool for towing; it is an integrated extension of your truck that allows you turn your 4x4 into the workhorse it was designed to be. The CURT under bed Double Lock gooseneck hitch is strong, fast and easy to operate. It gets its name from the two locking pins that engage the trailer ball and hold it in place, giving