Designed for use with the following pin boxes: Fabex 663 and 665. Lippert 0719, 1621 and 1621HD. M&M 663 and 665. 5th Airborne Sidewinder replaces your fifth-wheel trailer's king pin and alters the pivot point of your rig, enabling you to make up to 90-degree turns. Enclosed air spring in pin box absorbs shock and adjusts for a smooth ride. 5th-Wheel trailer's pivot point is moved an extra 22" toward the rear of your tow vehicle so that you can easily make 90-degree turns, even with a short-bed pickup truck. No need to get out of your truck, throw a switch, push a button or mount a 5th-wheel slider. Trailer tracks more closely to the truck for better driveability.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov