The security door is difficult to open if it is closed hard, but it is easy to open when it is close

No way. , the door is still shaking badly, proving that the door is not good and unqualified. , the problem of the door master. Nothing was a problem, it was possible to call the company. Let them help you fix it, if you say, if you can't fix it, you want to change it, I also do the security door,

That is caused by not closing in place, which is mainly related to the door leaf and the door frame gap is not adjusted well or deformed.

Listen to your description, your security door is inward-opening, right? It is usually the security door is pushed inward, if it can be closed but it can be opened, it means that there is a problem with the positioning of the lock tongue of the security door, and the gap between it and the guide piece is too large, resulting in no lock in place, you can adjust it.

Good 1) The hinges are not flexible enough, and there is dust accumulation. >>>More

Remember, after the door is closed, pull it again, or push it, and there is a sound that indicates that the deadbolt is in