Acc. to DIN 3122, ISO 3315, With square coupler, medium-fine toothed, extremely rugged, Return angle 7.5 degrees, Non-slip 2-component handle with hanging hole, For hand-operated sockets and accessories with square drive as per DIN 3120 - C 12.5, ISO 1174 ball locking device, GEDORE vanadium steel 31CrV3, chrome-plated, Vanadium steel 31CrV3, chrome-plated