Striker
The striker is the part of an approved locking unit which is inserted in the frame. It helps to keep the door closed. When the dead bolt and the bolt is pushed into its hole, the door keeps closed.
How does a striker work?
Together with a striker the hook bolt connects door and frame. The striker on image (1) is a safety reciever, which is part of the approved lock. But we also provide fully adjustable safety recievers (2).

For doors with wooden frames, there is a safety reciever with heavy-duty mounting plates in the frame. This kind of reciever is not suitable to retrofit, and if you thiniking of buying a new door with this option - contact a larger door manufacturers.