This Teng TENM120130 is a Bi-Hexagon Socket with a 12-point regular AF design and a 1/2 inch drive. It measures 15/16 inch AF and has a length of 40mm. This professional bi-hexagon, AF socket is produced in accordance with ISO 9000 and AS5954 specifications, offering increased torque and a reduced risk of rounding fasteners. It is manufactured from chrome vanadium steel with a satin finish. The socket features a 1/2 inch square drive.