EN 1303：2015 70 (35+35) Double insert/bilateral escape cylinder

The double cylinder is also known as a double escape cylinder and is a European type lock with an escape and emergency cylinder. It is designed to prevent the door from being unlocked with the key when the key is forgotten indoors or outdoors and to allow escape in case of an accident or emergency. The design of the lock is by the European standard EN1303 and is manufactured to a high-security standard. The most important function is to solve the problem of the ordinary European double-opening lock cylinder that cannot be turned after the key is inserted on one side to meet the user's emergency use in special circumstances.