Camco's RV Fifth Wheel Lube Plate helps protect your fifth wheel trailer against friction and wear. It fits on your RV's fifth wheel king pin to cushion vibrations while towing. This product eliminates the need for messy grease. The lube plate measures 8 1/4-inches in diameter and is 3/16-inch thick. It is constructed of high density, wear-resistant plastic. This product is ready to use and does not require any drilling or tools for installation.