Door Lock Knob For Pontiac Bonneville 1957-1960; RP 304-LUpgrade or restore your interior with this high quality set of four door lock knobs, manufactured from durable Wedgwood rubber for long lasting performance and a clean, factory style appearance. Designed with a self threading interior, these knobs install easily and securely onto your existing lock rods without the need for adhesives or modifications. Each knob measures 1 3 8" tall with a 1 8" lower inside diameter and 3 8" lower outside diameter,