This is the left hand (driver's side) guide plate that mounts on the rear of the door glass sash channel 1967 and 1968 Impala 2 door hardtop and convertible cars. It was also used in Full-size Buick, Oldsmobile and Pontiac 2 door cars (please check your car to make sure it has a similar shape as this reproduction piece). It is made of stamped steel and is the same as original in shape and appearance to the original die cast piece that was very weak and usually broken. It functions like the original. See pictures