A sheath. Usually swords go into it, but I guess knives could too.
A sheathe protects users and curious children from being cut.
the bed
belt loop...?
Yes, knives is a noun, a plural, common, concrete noun. A noun is a person place or thing and knives are a thing.
Always called it a tree stand.
A cutler
The "necklace" piece is called a Lanyard. Then the other piece that holds the card is called an ID Protector.
blademaniac
Butter knives.
A cutler
knife maker or forger
The thing that is a sash like object that holds a katana is called an obi.
They would change their lives forever