I use your super magnets for various purposes.
I discovered this practical use while walking through the house with a new super magnet.
The corners and frames of our walls are magnetic because steel profiles were used in the building process.
Because I often lose my car keys or the children run off with them ;-), I positioned a Q-40-20-10-N
on the ceiling and have gotten into the habit of hanging my key chain directly onto this magnificent magnet.
Result: no more searching, no more frustration, and all thanks to your super magnets.