Lt. & Rt. hardtop solid door shells ......at one time the inside panels where the window regulators and door mech. bolt in were removed (probably for a race car).....if you have a set of "beat up" doors with a good inside under the door panel, that panel can be cut out and welded in these shells, the repair not visible as it will be covered by the door panel .....just an option, as I don't want to scrap OEM parts ....