Zhangjiagang City Changjiang Metals & Lock Co., Ltd. was founded in 1974. Our company is a professional lock manufacturer, located in Luyuan Economic Development Zone of Tangqiao town, in Zhangjiagang City. Our company has strong capabilities of locks design, development, improvement, and manufacture. In addition, we have advanced equipment and strong technical force, including a well-trained team of professionals. Our company passed ISO9001: 2000 quality system certification in 2004. Our ...