In article ,
R.H. wrote:


251 drywakk screw/hanger

Yes, instructions on how to use it can be seen he

http://www.itwbrands.com/prod_ezanchor_hanger.php

Aha! I have a mirror which has a back likely intended to take
something like this, but I'd never seen the actual device before.

Basically the mirror (which is quite heavy) has a wooden back with a
round hole partially covered at the top by a metal strap, making a
D-shaped opening to a round hole. It's hanging now by an L-shaped-hook, but
if the hook were to rotate....