How to get free The Mann Co. Supply Crate Key

The Mann Co. Supply Crate Key is a single-use tool item which is available at Mann Co. Store. It can be applied to any series Crate in your backpack, where it is consumed, along with the crate, in the process. Each key can be used once and will open one selected Mann Co. Supply Crate.

Gameplay

To use a key, the player selects the key in their backpack and clicks the 'Use with...' button before selecting the crate they wish to be opened. During some special events, specialized keys are made available. These keys can be used with specifically associated series of crates, which regular keys cannot open. Remaining special keys, at the end of promotions, are transformed into regular keys.

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