The door fitting is absolutely beautiful and high quality. Great looking and easy to install. The rosettes are screwed, so please do not try to extort a screwdriver. Simply turn to the left. :-) It may be that a new mortise lock is necessary. A mortise lock for key will not fit. So better the mortise (for bathroom !!) order them together, so that the reconstruction can begin immediately. In the eighth mortise to "left" or "right". Otherwise it does not fit so again. One for "Bad" take because instead bowl now a square is in the lock. Needed uncertain whether left or rechst? Just looking "left right door stop" Googling below. The door hinge is not the side of the door abuts when opening and closing but where the door to the frame fixed (ie posted) is. So when I stand at the door in the room and see the stop (ie hinges) then I'm already on the right page. Now just see if the stop is right or left. Mortise is also here at Amazon so order them together. I have taken the Abus, ca 10 and everything fits perfectly. All together a quality solution that is installed quickly. There are certainly cheaper solutions but this one is really nice and makes of look and feel a high-quality impression. Many fun remodeling.