TheCASOMAN 10 PCS 1/2" Drive Deep Universal Impact Socket Set, Metric,10-19mm, Swivel Sockets, Flexible,CR-MO, which is manufactured from premium impact grade chrome molybdenum steel construction with corrosion-resistant black phosphate finish for durability. Flex socket design allows a full 360° of freedom for the universal head to angle and rotate. High-contrast size marking is permanently laser and easy to read, even in low light.