Manufactured from premium impact grade chrome molybdenum steel construction with corrosion-resistant black phosphate finish for durability. High-torque, 6-point opening grips flat sides of fasteners, not corners, preventing round-off Engineered for use with impact drivers, This axle nut socket can be used for the removal or installation of axle nuts. Large, high-contrast size marking is permanently laser etched and easy to read, even in low light Meets or exceeds ANSI performance standards. It comes with 1 year quality warranty.