DURABLE: This 11 piece 1/2" socket set is made from strong, chrome vanadium steel for durability. CONTENTS: The versatile set includes a 1/2" drive, a 72 tooth quick release ratchet and a useful assortment of sockets in sizes ranging 10, 11, 12, 13, 14, 15, 16, 17, 19, 22, and 24mm.