Made in the U.S.A., featuring the SureGrip® hex design, which drives the side of the hex, not the corner. Coated with a rust-preventative compound that makes them exceptionally resistant to corrosive factors. Laser engraved with 3 extra large markings every 120 degrees around the sockets for improved readability.SureGrip® Drive Design drives the side of the fastener, not the corner, to provide increased strength and avoid rounding of rusted or damaged fasteners.Corrosive resistant and laser engraved every 120_N/A