The countersunk mounting pot magnet / shallow pot magnet is a ferromagnetic steel cup into which is inserted a countersunk ring magnet. There is a hole all the way through the countersunk mounting pot magnet / shallow pot magnet. This allows a screw head to be inserted into the countersunk mounting pot magnet / shallow pot magnet to screw the countersunk mounting pot magnet / shallow pot magnet to any material of your choice to give a good mechanical hold.
