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: (19) 1/4 Drive Sockets-. SAE: 3/16, 7/32, 1/4, 9/32, 5/16 Product Features:Chrome-plated finish resists corrosionSpring-loaded ball bearing securely holds sockets in placeDurable reusable storage box