This TEQ Correct product has been carefully engineered and manufactured to provide dependable operation. Made from tempered chrome-vanadium steel for strength and durability. Product Contents: (16) 1/2 Drive Sockets-. SAE: 1/2, 9/16, 5/8, 11/16, 3/4 Product Features:Chrome-plated finish resists corrosionSpring-loaded ball bearing securely holds sockets in placeDurable reusable storage box