Features: Protect your digital assets with unparalleled security using this stainless steel mechanical password notebook, featuring hardware cold backup to shield against cyber threats and hacking attempts. Engineered with mechanical encoding technology on stainless steel plates, it ensures corrosions resistance, shockproof durability, and high temperature tolerance for long lasting preservation of private keys. Ideal for cryptocurrency enthusiasts, investors, and individuals managing sensitive information like private keys, offering reliabled cryptography asset security for all users. Perfect for secure storage in homes safes, travel bags, or daily carry scenarios, this portable cryptography notebook keeps your digital wealth protected wherever you are. Simplify asset management with easy combination password setup, supporting multiple cryptocurrencies without electronic devices for hassle less private key storage. Specifications: Component: stainless steel Size:As Picture Shown Encoding methods: mechanical encoding Package Includes: 1 Set Mechanical Password Notebook note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.