Made in the U. S. A. The SureGrip®hex design drives the side of the fastener, not the corner. This not only provides increased strength, but also makes S_K wrenches effective on partially rounded fasterners. Box ends are offset for improved access in tight work spaces.SuperKrome® finish provides long life and maximum corrosion resistanceSureGrip® hex design drives the side of the fastener, not the cornerN/A