What is the impact of the security door opening outward or inward at home?

First, when the bad guy wants to force his way in, he must break the lock if he opens it to the outside. Now the security door is doing well in this respect, so it takes time. If the bad guys have time, then you have time to ask for help. If it opens inward, then if it is strong, it can hit it in a short time.

Secondly, after all kinds of earthquakes, there is a situation that when the door opens inward, if the wall is deformed, it is difficult to open it only by the handle and the back pull of the person, but if the lock of the outer door is opened, the person can forcibly pry it open.