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 you twice the security when towing especially heavy trailers. This replacement gooseneck ball is designed to fit CURT gooseneck hitches #60703, #60704, and #60705. It features a tough chrome-plated finish to stand up to the strain of heavy-duty towing and is tested for safety to meet SAE J2638 specifications. It also features a 2-5/16" ball diameter to fit most gooseneck trailers.