The Wire Lock is a lock on the Main Door that was added to Granny in Update 1.0. It has two segments, both unlocked with the use of the Cutting Pliers. The Player needs to unlock it in order to escape through the Main Door.
The Wire Lock has two parts, the top part and the bottom part. Both are red when the Player first starts the game. If a part of the Wire Lock is unlocked, the part that was unlocked will turn green.
To unlock the top part, use the Cutting Pliers on the wire on top of the Wire Lock itself. Doing so turns the top part green.