One、How to unlock a hand-crank lock
Rotating the handle of the lever lock clockwise will achieve the locking effect. Alternatively, turning the key two times in the keyhole will prevent unauthorized access, even if someone has a key. Another method involves using the key to lock the door, then, without removing the key, rotating it to a vertical position, effectively creating a latch for added security.
Two. How to open a door that has been locked with a double-lock mechanism?
1、Card unlocking
once the handle lock is reversed, we can use a stiff card to insert into the door gap and apply pressure to unlock the lock.
2、Using a multi-bit pliers to unlock
Use a claw hammer to grip the handle and twist it counterclockwise to remove the handle and lock cover. Then, use a pry bar to push the lock body inward. While holding the pry bar, continue to move it to hook the latch and push the door.
3、Using a pry bar
Find a wire or a small hole located on the handle neck, insert a flat tongue-and-groove handle into it, while pulling it outwards. once the handle is detached, pry open the cover. There are two fixing screws; find a way to loosen them. once the body is pushed outwards, leaving only the tongue, use a pointed pliers or a flathead screwdriver to move the tongue and hook it towards the horizontal slot without letting go. once released, it will pop back. Then, push the door open.
4、Demolition Method
If all else fails, you can use a hammer or saw to break the door open, and then install a new door lock.
5、Professional locksmith services
Alternatively, we can hire professional locksmiths to open the locks, which is a more convenient and efficient solution.