SK 3915 15 Piece 3/8-Inch Drive 6 Point 7-Millimeter to 24-Millimeter Flex Socket Set, Model: 3915, Hardware Store. SuperKromeÂ® finish provides long life and maximum corrosion resistance. SureGripÂ® hex design drives the side of the fastener, not the corner. Indirect approach to the fastener. Made in the U.S.A. Lifetime Warranty.