MAGNETIC EXCELLENCE: Premium industrial-grade magnets feature exceptional magnetic force, ensuring outstanding drill bit retention. Utilizing gravity-pressed embedded magnets eliminates the risk of magnet detachment. RADIUS CORNER DESIGN: Reduces wear and increases torque on fasteners by placing force on fastener walls rather than fastener corners. Meets or exceeds ANSI performance standards. PREMIUM CR-MO: Made of premium impact grade chrome molybdenum steel construction with black phosphate finish, offering excellent resistance to hydrogen corrosion and high temperatures. Provides the strength and flexibility to handle high torque impact tools. DUAL SIZE MARKINGS: Laser etched and roll stamped markings to ensure permanent socket identification, and they are easy to read even in low light.