Made from the best quality SAE 4140 Chrome Molybdenum high impact steelheavy-duty flexible joints allow easier access to fasteners in hard-to-reach areasTORQUE DRIVE® socket design contacts the fastener on the sides instead of the corners, reducing fastener rounding and allowing up to 20% more torqueChamfered edges allow easiest socket placement on fastener, increasing productivity and reducing frustrationReinforcement ring ensures maximum strengthColour coding easily distinguishes between metric and SAE