Designed to keep the rocker arms positively locked for precise and critical valve train adjustments. Manufactured from quality grade steel, then heat-treated for extra strength and plated with a durable finish. Kits include 16 rocker arm nuts with socket head set screws and one hex key wrench. Product Features:They are zinc dichromate plated steelThey have black oxide coated set screwsKeeps rocker arms positively locked
