Yantai Tri-circle Lock Industry Group Co., Ltd. (formerly known as Yantai Chengming Lock Factory) was established in 1930 and is one of the oldest lock manufacturers in China. With over 70 years of experience, we have grown into a large scale enterprise with a registered capital of USD15,000,000, total assets of USD125,000,000, and over 5,000 employees. We have over 13 subsidiaries, a large R&D center, over 10 product lines with over 100 specifications, and are expanding to prepare for further future growth. 







Our specialized product lines include locks, padlocks, and safe boxes, using non-ferrous metal processing, printing, and plating. We manufacture padlocks, bicycle locks, chain locks, wire locks, combination locks, door locks, automotive locks, safes, magnetic card locks, smart card locks, and anti-theft and security systems. Our annual output is 200,000,000 pieces with an annual sales volume of over USD125,000,000. 







We have won numerous awards and honors and have earned an excellent and trustworthy reputation from our customers. Since 1952 our