Features and Benefits: Made of high quality steel (chrome-molybdenum); Engineered specifically for use with impact tools, using the most up to date industrial specifications; Made to transfer the pressure from the thinnest part of the socket wall toward the thicker section, resulting in increased strength; Packaged in a molded storage case; Limited Warranty; Contains Sizes: 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″, 15/16″, 1″ in deep length. Packaged in a molded storage case.