Old houses with razor blade slots

Feather Styling Razor Disposal Case - medicine cabinet razor blade slot The video above shows the finding of razor blades inside a medicine cabinet If you notice one of these small slots in your bathroom cabinet medicine cabinet razor blade slot I found this fascinating a pile of old razor blades If you remember, medicine cabinets used to have a slot in the back to stick your dull

medicine cabinet razor slot So it goes into the wall and inside of it Pretty durable little piece Anybody know what that's for? So that little slot is for straight razors When the