Made from premium impact grade chrome. molybdenum steel construction with black phosphate finish for durability Used wherever powered drive tools are used to install or remove fasteners.High-torque 6-point opening grips flat sides of fasteners Flexible socket design allows a full 360° of freedom for the universal head to angle and rotate, to reach tight spaces for more better coverage. Features two through holes and a groove to accept a Proto Retaining Ring or pin and O-ring to help secure the socket to the drive tool anvil We take great pride in our products and as a valued customer, we appreciate your feedback. If you have any problems with our sockets, please email us first!