These are original 1958-1963 Chevrolet Armrest Screw Retainer Clips. The retainer nuts are for all 2 or 4 door sedan or hardtop models including Impala, Bel Air, and Biscayne. There are two styles of clips but both of them are interchangeable.
Fits: 2 and 4 door Sedans or Hardtop
Fits: Impala, Bel Air, Biscayne and Parkwood