The Demco Autoslide Capture Plate Kit replaces the capture plates on your Demco Autoslide fifth-wheel trailer hitch so you can use it with a Rota-Flex or Lippert Road Armor pin box. Plates prevent the king pin from rotating inside your trailer hitch.• Prevents your king pin from pivoting inside your Demco Autoslide 5th-wheel trailer hitch• Required for use with your TrailAir Rota-Flex pin box• Also works with TrailAir Air Ride and Lippert Road Armor pin boxes• Fast and easy installation• Brackets replace capture plates that came standard on your hitch and secure with existing hardware Works with TrailAir Rota-Flex, Air Ride, and Lippert Road Armor pin boxes Installs quickly and easily Secures with existing hardware | Autoslide Capture Plate Kit for TrailAir Rota-Flex and Lippert Road Armor Pin Boxes