1/2" square drive AF hex sockets manufactured from chrome vanadium steel, hardened, tempered chrome plated & polished, chamfered ends for positive nut location & special radius design to give added torque & life expectancy. Sockets have a knurled band for extra hand grip & a hole for positive ball retention. Manufactured in accordance with DIN3124/ISO2725 & DIN 3120/ISO 1174. Set Contents: 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 AF.