Why is it normal for internal doors to have 90 degree handles and recessed units in the frame. These need extra work on the door and the frame and for what?n Why not the self-centring hinges as on wardrobes and cabinets or a simple push-pull system with a magnet it the frame and a metal plate on the door. If you are carrying food, you can bum your way in and bum it shut. Why complicate it?