The PlexiDor security plate is attached inside the home and can not be removed from the outside.
PlexiDor sizes medium, large, and extra large are delivered with a metal security plate that is screwed onto the frame from the inside of the house. The small PlexiDor doesn’t have a security plate since it’s too small for anyone to get through.
There is a sliding track accessory for the PlexiDor that screws on the frame and allows the security plate to be slid into place instead of screwed on. This is also located inside the house.
It is very difficult to force a locked PlexiDor open, and when the security plate is correctly attached, getting through the door from the outside is virtually impossible.