S-K Tools – USA. #19734 9 pc Set of Allen Hex Key Socket Bit Drivers. 3/8″ Drive & 1/2″ Drive #41403 – 4mm. #41412 – 12mm (1/2 drive). #41414 – 14mm (1/2 drive). #41417 – 17mm (1/2 drive). They range from good to very good used overall condition. They all have a marks, scuffs and scratches in the chrome finish from use. The hex shafts also show discoloration and patina from age and use.