Unusual Doorknobs Designed with a Grim Functional Purpose
Here are a series of unusual doorknob designs with vastly different forms. See if you can work out what they all have in common: What they have in common is that you cannot loop a cord/rope/shoelace around them. These "anti-ligature" doorknobs are designed specifically for behavioral health facilities, hospitals and correctional institutions where the room's occupants might harm themselves.

Here are a series of unusual doorknob designs with vastly different forms. See if you can work out what they all have in common:
What they have in common is that you cannot loop a cord/rope/shoelace around them.
These "anti-ligature" doorknobs are designed specifically for behavioral health facilities, hospitals and correctional institutions where the room's occupants might harm themselves.