If one or both of your door windows are no longer operable, there's a good chance the OEM pot metal pivot pin has sheared off. Rennline now offers the only heat treated pivot pin on the market. Typically you need to know whether or not the slot is parallel to the notch on the back, but Rennline's pivot pins include both the parallel and perpendicular slots to ensure that you have the right part for the job. (1 pivot pin included per kit)