Much simpler than padlocks and still secure.
They come with a specific key from the manufacturer as in the picture below.
As you might expect, those keys are sometimes lost or misplaced.
I have seen places where people forget and leave them on the faucets only to find them gone.
As I described in my earlier text, the 4-Way Key is a universal tool that fits a variety of different faucets.
It's always wise to have a backup or two.
