Though the specifics of it's power, or how to use it have been lost to the annals of time, it is known to be able to break things down to their components parts.

The Left Shoe is one of the five Items locked away in The Vault by the Vanguard.

The Vanguard had planned to use this Item to destroy other dangerous Items, but after multiple attempts the only things disassembled were the people attempting to use it.