I was looking for a safety guard for the stairs for my rabbit. Unfortunately, one is this so small that it would fit through the conventional stair gate. This grid is perfect for the intended use. The respective two outer elements are already assembled and the door in the middle you can screw themselves. Thus I could easily use the grid with only 3 elements and use the other two on a door frame. For stability, we included a crossbar which connects the respective second element with each other. Since I do not use it I do not know how it works in the long run. but when I had the unique structure felt that it is quite stable. The closing of the door could be installed in my opinion, in two places, and produce more stability of the connection between element and door.