I wanted a large diameter door knob for only one side of a pantry door. The majority I found on the web were too small, looked bad, or were for cupboard doors only. Then I came across this one. It looked the part and it had three screw holes on each piece so I ordered it.
The joiner who fitted the door commented on the quality and that the mechanism was smooth with a solid feel.
So in the remote possibility we somehow damage this, we have a spare.