Hidden Valley depot key

 is a miscellaneous item in Fallout: New Vegas.

Characteristics
This key unlocks the door underneath the Brotherhood´s armory salesman Knight Torres.

Location

 * Can be found in Knight Torres' inventory.
 * Pickpocketing is the only way to get to this key and even though you cannot get behind Knight Torres, there is a way to be hidden to her while crouching infront of her.
 * Using a stealth boy is also a possibility