Never Grease Your 5th Wheel Plate Again! Reduces your fifth wheel lubrication cost and time. No re-greasing on the road means you won't have greasy hands or clothing anymore. Constructed of high density, wear resistant plastic with an extra large 10.5 Inch octagon surface for reduced friction. Press firmly over the 5th wheel king pin for easy installation. The plate will lock onto the pin. No drilling or tools required for installation.