The word “deadbolt”.

I like the word deadbolt because it has a finality about it. It defines a bolt that is dead because a key can unlock it only from outside. There are horizontal deadbolts and vertical deadbolts but, as far I can tell, there are no diagonal deadbolts, although Diagonal Deadbolts would make a good name for a rock band.

Classic deadbolt

When it comes to locking doors with deadbolts, our creative instincts are on full display. There is the Classroom deadbolt

Schlage B663P Single Cylinder Classroom Deadbolt

The Exit-only deadbolt

Schlage AL25D-SAT Saturn Exit Only

The Push-button deadbolt

Push Button

The Single cylinder deadbolt

Single Cylinder

And a bunch of others.

Meet the deadbolt: simple, solid, functional and well, boring.

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