These 1963-1964 Chevrolet 2-Door Hardtop left door panel rails are original GM parts that have been restored. The door panel rail goes on the inside of the door and secures the panel to the door. The sheet metal is media blasted and ready for the upholstery shop. Need an upholstery shop to cover your door panel rails? Call us at the shop for more details on getting your rails pre-assembled.