GEDORE EXTENSION Manufactured according to DIN 3123, ISO 3316 For hand-operated sockets with square drive as per DIN 3120, ISO 1174, with ball locking device GEDORE vanadium steel 31CrV3, chrome-plated For manually operated sockets and accessories with 1/2” square drive. › Chrome Vanadium steel 31CrV3. › In accordance with SANS 1113 and DIN 3123