Feature 2: The lock designed based on the technology of double code spring to avoid loid, which absolutely cannot be opened by any others except the only one mating key.

• 特点2：锁具采用双组防万能钥匙"加密弹子"技术设计；在没有正确的钥匙开启的状况下使用非正常工具绝对无法开启，安全性能超强.