Quick Release Shower Curtain Hooks can be used in any normal bathroom on a 25mm or 1" tubular shower rail, or they can also be used to prevent for example children pulling the rail off the wall by using the curtain as a swing. The hooks will simply come off the rail when excess weight is applied to the curtain
Pulling the curtain hooks along the rail is easy and they will not easily fall off, but try to put significant weight on the hook and it simply opens up and pulls away from the rail.
This is a nice simple safety feature and of course the hooks can be pushed back onto the rail easily in the event of one coming off.