Manufactured from Chrome Vanadium steel with manganese phosphate finish for added resistance from corrosion. Turns any power drill into a power nut driver with added reach. Contents: 65mm 1/4"Hex x 1/4"Sq Drive, 65mm 1/4"Hex x 3/8"Sq Drive, 75mm 1/4"Hex x 1/2"Sq Drive. Country of Origin: Taiwan, Province Of China, Weight: 0.2645547144 pounds, Manufacturer: Sealey