The SureGrip® hex design drives the side of the fastener, not the corner. This not only provides increased strenght, but also avoids the rounding of rusted or damaged fasteners, which can occur when using a sharp cornered hex tool. High polish SuperKrome® plating results in a jewelry-like finish, providing long life and maximum corrosion resistanceSureGrip® Drive Design drives the side of the fastener, not the corner, to provide increased strength and avoid rounding of rusted or damaged fasteners.Made in the USA25 Piece 3/4", 13/16", 7/8", 15/16", 1", 1-1/16", 1-1/8", 1-3/16", 1-1/4", 1-5/16", 1-3/8", 1-7/16", 1-1/2", 1-9/16", 1-5/8", 1-11/16", 1-3/4", 1-13/16", 1-7/8", 2", 2-1/16", 2-1/8", 2-3/16", 2-1/4", 2-3/8" Standard Sockets. Packaged in a cardboard carton