I won't post this photo on ALR Forum, I might get banned or cursed to Flintlock purgatory. I wanted this patch box lid to stay closed and didn't want to pay $30 for a complicated PB release mechanism but I got these small strong magnets that are coned for screw heads and this holds with about 3# of force. Enough to stay closed until I want it to open. So I cut a 3/8" diameter piece of rod to match the 3/8" diameter magnet and it went in just slick. I'm pretty tickled with it. No one will know but me (and you) unless I open the BP lid and show them.