CURT gooseneck hitches can be broken into two main categories: under-bed and over-bed.
Under-bed hitches include the Double Lock EZr, OEM-style, original Double Lock, Quick Goose II, and the Under-bed Folding Ball gooseneck Hitches. The over-bed goosenecks include the Fixed Ball, and the Over-bed Folding Ball Gooseneck hitches. All hitches are tested to SAE J2638 standards for safety.
CURT also offers OEM Gooseneck Ball and Safety Chain Anchor Kits for Ford, GM, Nissan, and Ram, as well as the X5 Gooseneck-to-5th-Wheel adapter plates, and gooseneck hitches that are compatible with already installed 5th wheel rails.