Offering you ultimate protection, the Austral Lock HD7 Hinged Security Door Deadlock is engineered with your family's safety and security in mind. Suitable for hinged security and screen doors, the HD7 Hinged Security Door Deadlock latches on closing and can be unlatched by levers from either side of the door. It can be deadlocked or unlocked with a key from either side. There is also a convenient snib locking function from the inside. (The key overrides the snib). Available in a variety of finishes. Australian designed and manufactured in Melbourne.