The Mann Co. Supply Crate Key is a single use tool that can be purchased from the Mann Co. store. Each key can be used to open a selected locked supply crate.

About The Key

To use a key, the player selects the key from their backpack and clicks the 'Use with...' button before selecting the crate they wish to open. The key can be used with any regular series crate in the player's backpack, where it will be consumed along with the crate.

Keys cannot be found through random drops and cannot be crafted.