Key | Grindhouse Key

Sculpted by: Arlen Pelletier
Release: 2020
Edition: Legacy
Used material(s): Cast in antique pewter-plated white metal
One of: Unlimited

Signed: No

Issued in Ghost Door box

First appearance: Grindhouse (one-shot)
Use: Opens a door that is all mouth
Door: Feeding Door (?)

More information:
(possible spoilers)

Used in Grindhouse by Mary Locke to get rid of one of the gangsters. See opens a door that contains a pair of vampire-like teeth and a tongue and eats the gangster.  Undiscovered by the current generation.

Source: Locke & Key Wikia