The gap under the door is too large, and there is a gap of about 4cm under the security door, so the

There are generally three expansion screws that are driven into the wall at the hinge of the security door, that is, the screws, some of which may have fallen off, you can check them yourself, and then ask the installer to help repair them.

Normal, it is left by the truncation during production, which does not affect the anti-theft, but it is not good-looking.

No, generally double doors are without door frames.

It mainly depends on how your stainless steel material is. It's not a real 304 material. If it's fake, it's easy to rust and rot!

This lower latch is falling off, probably because its quality is not very good.