Seller: weselldoorknobs (10,420) 100%, Location: Charleston, South Carolina, Ships to: US, Item: 261860807935 This is an emergency key for a mortise privacy lock. Used to unlock a deadbolt controlled on the inside of the door by a turn. It would go into the side of the lock facing the hallway. Made of solid cast brass. Measures 2 1/2" in length. Condition: This is a reproduction privacy lock key. New condition.