Jin Shuangjian has a number of original patented technologies, such as crescent-shaped column lock anti-pry structure, internal and external milling super B-class lock core, idling lock core and so on. It can be said that it is one of the representatives of the highest level of locks in China, with excellent performance and slightly expensive price. Jiaheng double swords are mostly of opposite sex structure, which largely avoids the popularization of lock cores. In terms of personalized design, Jiaheng Shuangjian has its own opinions and good cost performance. Moreover, the latest anti-breaking lock core solves the problem that the copper lock core is easy to break because of its low hardness, which is very safe.