8pcs DR 1 deep impact socket set /tool set/socket set/auto repair tool set/impact socket 21,22,24,27,32,36,38,41mm Primo Impact Sockets·All Impact sockets are made from high strength CR-MO alloy steel. ·Special heat treatment for the best combination of strength and impact resistance.·Optimum wall thickness design for strength and access on fasteners having restrictions·All dimension precision to ...