Product Features: It has the functions of fire prevention and dust prevention. This upgraded important document storage Box is made of high-strength steel-coated and fireproof cotton material . After thousands of high-temperature tolerance experiments, in the event of an accidental fire, it can quickly activate its own fire prevention mechanism. A dense carbonized layer is instantly formed on the surface to prevent heat conduction, just like putting a fireproof armor on the documents, keeping important documents away from the threat of fire. Easy to use: Make sure to keep your 2 keys safe, as this is the only way to open the safe. This is to ensure the safety of the items inside.