1/2DR 30PC SAE/MET. 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. Contains: Fractional Sizes 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″, 15/16″, 1″, 1-1/16″, 1-1/8″, 1-1/4 and Metic Sizes 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm, 26mm, 27mm in deep length.