These little black pinch clamps are used on the engine for various 1/2” hoses. Usually, they are found on the PCV valve, the brake booster and the intake where these meet the intake fittings. Replace your incorrect worm gear clamps with these correct black oxide pinch clamps today from Eckler's and keep your Nova show fresh! Always trust Eckler's for all your performance, accessory, and restoration needs!