Specifically designed for automotive applications; 100% made in the U.S.A., featuring SK's SureGrip® hex design, which drives the side of the hex, not the corner. This not only provides increased strength, but also avoids the rounding of rusted or damaged fasteners, which can occur when using a sharp cornered hex tool. Improved black coating retains more rust preventative compound than black oxide.Improved black coating retains more rust preventative compound than black oxideMade in the USAN/A