Vufold offer two different styles of Internal Bi-fold door. Finesse and Edge These are a standard style internal bi-fold door, you get a single traffic door that can be opened on its own. When you open all the doors they generally all slide and fold to one end with the doors protruding at 90 degrees to the track. Inspire With the Inspire range you still get a traffic door that can be opened independently of the others but when the doors open fully they can be folded back 180 degrees against the wall watch are short video below to see how they work.