Razor Blade Holder -

Razor Blade Disposal Containers - McMaster-Carr razor blade wall slot These old units had a slot in the back that was used to discard used blades, which would allow them to fall into the wall cavity between razor shark slot machine I have one in my medicine cabinet and have been using it for awhile I've seen the one on the wall as well in other houses

razor blade slot in medicine cabinet Apparently old medicine cabinets have a disposal slot Overdone