"It's a key to 'The Lab'."
The Lab Key is an item available only in Stick RPG 2. It is given to the main character by Professor Ansel, in exchange for all three 4th dimension objects. It is necessary for unlocking The Lab, where the player can complete the game and finish the story.
- Though the item is called "The Lab Key", it is visibly apparent that the item consists of two keys. It is possible that the yellow key on the key ring is the Basement Key, the only other key in the game that the player is required to have.