SK PROFESSIONAL QUALITY: SK hand tools, including our sockets, are manufactured to rigid specifications. Quality control at every step of the production process ensures that each SK socket tool delivers exceptional performance and meets/exceeds global standards SUREGRIP DESIGN: This set features SK's SureGrip hex drive design, which drives the side of the fastener, 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 DURABLE SUPERKROME FINISH: High polish SuperKrome plating results in a toughest, jewelry like finish, providing long life and maximum corrosion resistance to your 12-Point Cold Forged Steel Socket RUGGED STEEL CONSTRUCTION: This chrome socket is cold forged with high alloy US steel for maximum strength. Manufactured from durable materials to give superior service year after year and to last a lifetime with proper care and usage MADE IN THE USA: All SK tools are premium quality, precision crafted and made in the USA with American steel. The limited lifetime warranty backs our high-performance tools built, to last a lifetime