I'm just a guy down in Austin Texas who had a shed whose doors needed a way to close and lock...
Before my invention, I tried several different latches, somehow hoping the mechanics would be "magical" and "just work", but they never did...
I ended up buying some 2×4 bar holders from Lowes (I have the type on my non-secure store area) and putting them up. I was fairly happy with them, up to a limit.