浙江浦江三菱制锁有限公司，成立于1999年，坐落于有“中国挂锁生产基地”之称的浦江县，距离义乌仅20公里，交通十分便利。公司占地1.4万平方米，固定员工近300人，高级技术人员80余人，公司拥有一流的设备、先进的技术、完善的工艺和高素质的销售团队，是一家专业生产、销售各类挂锁的产销一体化企业，现已是挂锁协会副会长单位。公司分别通过了ISO9000质量管理体系认证和浙江制造品字标认证。另外，公司先后被评为中国优秀制锁企业、浙江省诚信企业、浙江省守合同重信用单位、纳税大户等荣誉称号。
     三菱锁业，一直以来致力于传统挂锁的生产和销售，主要产品有：各型号灰色拉光铁挂锁、电镀铁挂锁、叶片锁、包梁锁、仿铜铁挂锁、骆驼锁、铜挂锁、套壳锁、矩形锁等。此外，各类圆钢锁、圆饼锁等也在逐渐开发生产中。产品远销埃及、土耳其、墨西哥、尼日利亚、迪拜、匈牙利、印尼等20多个国家；年销售挂锁5000万把以上，年产值超1亿元人民币。
     三菱锁业始终将产品质量、公司信誉和生产效率视为企业发展的根本，十五年如一日，坚持以传统挂锁为公司主打产品，不断改进传统挂锁的生产工艺，提高生产效率，三菱已经将目光投向世界。三菱挂锁，终将锁定世界。 

     Zhejiang Pujiang Tri-rhomb Lock MFG Corp., founded in 1999, is located in the Pujiang Town that is known as “China Padlock Manufacturing Base” in the middle of Zhejiang province, and only 20km from Yiwu, with very convenient transportation. The company covers an area of 14000 m2, and owns 300 permanent staff, more than 80 senior technique engineers. The company has top-ranked equipment, advanced technology, perfect industrial art and high efficient marketing team. The company is an integrity corporation specialized in producing and marketing.different kinds of padlocks, and now is the Vice President Company of Padlock Association.
     Tri-rhomb Lock has been concentrating on producing and selling traditional padlocks. The main products includes: various models of grey iron padlock、plated iron padlock、 vane key padlock、half beam packed padlock、brass painted iron padlock、camel type padlock、 brass padlock、armored rectangular padlock、 plated rectangular iron padlock and so on. In addition, various kinds of discus padlock  solid steel padlock……are under developing and producing. The products are well received by the vast customers in Egypt, Turkey, Mexico, Nigeria, Dubai, Hungary, Indonesia and other 20 countries . The yearly output is over 50 million pieces padlocks, and the sales volume is over 100 million RMB..
     Tri-rhomb always regards the product quality, company credit and the producing efficiency as the basis of the development of company. For 15 years, the company has persevered in traditional padlock as the main product of the company, and steadily improving the industrial technique so as to raise the traditional padlock producing efficiency. Tri-rhomb is now aiming at the 
whole world market. Tri-rhomb lock, lock on the world!