A.Lee wrote:

Michael Kilpatrick wrote:


Our builder has, much to my annoyance, fitted a mortice sash lock on a
new bedroom door and two bathroom locks on two other new doors which are
not capable of supporting unsprung door knobs. We have some nice brass
knobs to use.


I'd say they are either very cheap mortices, or, more likely cheap
knobs.

I doubt they were cheap originally (whenever that was). For a start,
they have a screw-on rose so that the fixing screws are hidden. You
don't get those for £10, as far as I can see.

Michael