Silverline - 1/2INCH SQUARE DRIVE METRIC HEX SOCKETS 12MM - 171338 1/2" square drive metric hex sockets manufactured from chrome vanadium steel, hardened, tempered chrome plated and polished, chamfered ends for positive nut location and special radius design to give added torque and life expectancy. Sockets have a knurled band for extra hand grip and a hole for positive ball retention. Manufactured in accordance with DIN3124/ISO2725 AND DIN 3120/ISO 1174.
