THIS IS FOR A NEW SET OF 1955-1956 CHEVROLET 150, 210 AND BEL AIR RUBBER HOOD STOP BUMPERS WITH THE ADJUSTER BOLTS AND JAM NUTS. A 55 OR 56 USES ALL 4 OF THESE HOOD STOPS, ONE ON EVERY CORNER. THE THREAD PITCH ON FRONT ADJUSTER BOLTS ARE (5/16-18) AND THE REAR ADJUSTER BOLTS ARE (1/4-20). SKU# 11255