How to adjust the self opening phenomenon of the security door

The security door deadbolt adjustment is highly professional, and non-professionals may not be able to adjust the deadbolt. >>>More

Hello friend.

This may be a detailed reading of the instruction manual, which is usually specific on the manual, but of course, you can also consult the store that sells it. >>>More

1. If we encounter the problem of not being able to close the security door when we close it, it may be that the security door is deformed, or the hinge. >>>More

Is there no gap underneath?

Or is the gap below one side big and the other small? >>>More

There is a special unlocking and door-to-door service, but it must be approved by the Public Security Bureau and guaranteed.