These crypto wallets are made of Metal, with a melting point exceeding 2,500 degrees Fahrenheit Cold Wallet backup is compatible with BIP39 wallets and can be used with most hardware wallets. It supports up to 24 mnemonic seed phrases, making it convenient to work with other crypto seed storage devices and wallets With these steel crypto wallets, you can record information such as fieldworks passpals and BIP39 word lists, and they are also compatible with 12 or 24-word seeds in most languages, making them suitable for storing your private cryptocurrency information or, in many cases, you may need a private cold storage system You receive a 2-in-1 steel Bitcoin wallet with matching lock screws and a metal plate marker pen. This is a matching set that can help you protect your code, password and, more importantly, your cryptocurrency You can use the matching screws to lock the steel Bitcoin wallet. If you still feel unsafe, you can also lock them and hide them elsewhere