A capture plate is a required component of the SuperGlide fifth wheel towing system. This plate is attached to your trailer's skid plate. When you're hooked up into your SuperGlide hitch and ready to tow, it isolates the rotation of your trailer's king pin in the hitch. Movement and rotation is then transferred to the automatic cam action of your SuperGlide hitch, moving it away from the cab along its rails to prevent the trailer from contacting the cab of your truck. Fit: Fabex 770, Lippert 1621, Lippert 1621 HD, & Lippert 1716 (12-3/4" to 13-1/2" and 14" Wide) | Pull Rite Quick Connect SuperGlide Capture Plate for Lippert & Fabex Pin Box