Iron door old fashioned anti theft door lock, no key, just locked back, how to open?

If the door is not locked, it can be opened with a hard card.

If your home security door is a cross lock (the key head is a ten-shelf) or a magnetic lock (the key is a round iron bar. >>>More

Insert a suitable screwdriver into the keyhole, twist the lock cylinder with both hands and it will break, dial it out and discard, and then dial the paddle in the keyhole, and twist it with a screwdriver a few times to open it (like twisting the key).

The security door is not locked, it is just locked, and the key is forgotten at home. The door is open outward, is there any trick to open it? >>>More

Whether the lock cylinder is round or refers to a general ball lock. If the ball lock is simple, slowly rotate the back ball, when you see the two holes aligned near the middle of the trail near the middle of the ball, use the tip of the lock accessories to press the punch inside the hole, you can pull out the back ball after pressing down, loosen the back cover plate, load the lock body from the outside to the inside through the door hole, and then tighten the cover piece, and install the back ball.