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; Lifetime warranty; ocket is thoroughly made with the correct balance of strength and durability and is tested to the highest specifications to deliver outstanding performance at the most competitive cost.; 3/8 in. Drive x 3/4 in. Standard Universal.