Ningbo Sijin Machinery Co., Ltd. is a national new & high-tech enterprise, which is founded in 1993. We own a standard workshop reaches 20,000 m2, and a large group of domestic CNC machining equipments and testing equipments. We have three-coordinate measuring machine (CMM) to ensure the producing accuracy of each machine, which is the only one enterprise who has CMM in domestic cold forging machine manufacturing industry.We produce bolts and parts cold forging machine from M6~M30. We are the first brand in domestic cold forging machine manufacturing industry.