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The Best Metal Cryptocurrency Wallet Backup Passphrase

Any crypto user should be concerned with the security of their digital assets. As you may know, cryptocurrencies are decentralized; thus, the sole responsibility of securing crypto assets lies with the owner. While hacking presents a serious risk to cryptocurrencies, user error involving the loss of private keys, seeds, and mnemonic passphrases has become a common way individuals lose their crypto assets. There are numerous cases where individuals lost their entire crypto portfolio by losing their laptops, hard drives, hardware wallets, or forgetting their seed/passphrase. 

To prevent such losses, crypto holders must safely store their seed phrases/ passphrases; they are the only solution to recovering lost crypto wallets. There are plenty of options for storing seed phrases and passphrases, including writing them down on paper and laminating or engraving them on stone tablets and metals. But the most durable option for storing seeds and passphrases is seed storage devices. There are various metal wallet backups, and you should choose the best one. Here are some options you may consider to secure your seed/passphrase 

4 Best Metal Wallet Backup Passphrase

Coldbit Passphrase

  • Weight: 0.115 kg 
  • Dimensions: 10 X 0.13 X 0.13 cm 
  • Enclosure: Foil, Brass Tube, Faux Radiation 
  • Material: Steel, Titanium 

Coldbit Passphrase is a durable solution for storing your wallet seed and passphrase backup. The seed storage device can store up to 6 BIP-39 passphrases, with each passphrase consisting of up to 28 characters or 4-6 words long. In addition, the device is heat and corrosion-resistant stainless steel molded in a hexagonal shape. 

Coldbit metal passphrase offers comprehensive protection against water, fire, corrosion, electrical shocks, and physical destruction. Nonetheless, after stamping your seed/passphrase on the Coldbit Passphrase, you must ensure it’s stored safely, preferably from the wallet seed backup.    


  • Weight: 12 Ounces 
  • Dimensions: 8.03 x 5.67 x 0.71 inches
  • Material Type: Stainless Steel 

Steelwallet is another excellent offline backup tool for storing your recovery seed. The tool offers protection against fire, water, electrical shocks, corrosions, and physical obstacles. In addition, the metal backup passphrase employs a simple yet vastly attack-resistant means of backing up your mnemonic seed. 

The device comes in a set encompassing a puncher and two-laser engraved stainless steel sheets with space for six words on each side to store 24 mnemonic seed words. To engrave your seed/passphrase, you first need to use a pen to highlight the exact position you’re going to punch. Then you punch the first four letters of each word to identify the mnemonic word. Then you countercheck the engraved seed/passphrase to ensure you haven’t made any mistakes. Finally, you can use the puncher to mark the highlighted fields’ sheets and then store your Steelwallet in a secure place. 

Steelwallet is a simple yet efficient means to back up your crypto wallet’s seed phrase/passphrase.  

Cryptosteel Capsule

  • Weight: 14.4 Ounces  
  • Dimensions: 4.09 x 2.36 x 0.24 inches
  • Enclosure: Stainless Steel 
  • Material: Stainless Steel 

Cryptosteel Capsule is a high-end metal wallet backup passphrase to secure your seed phrase/passphrase. The device is constructed with stainless, shockproof, acid-resistant, and fireproof material that survives extreme physical stress and temperatures up to 1400C/2500F. The metal wallet employs the long-standing idea of engraving. It comes in a DIY assembly format, thus allowing you to engrave your seed/ passphrase without third parties’ involvement. It’s double-sided, with each side holding 12 mnemonic phrases. The adjustable separators enable you to store your mnemonic seed fully and support all printable ASCII characters. 

Cryptosteel is compatible with most secret sharing and key generation algorithms, meaning that your passwords are protected and not visible at first glance. As a result, your mnemonic seed will remain safe even in theft, vandalism, or violence. Better yet, the device is resistant to next-gen surveillance methods, thus offering full protection from hackers. 

Cryptosteel is affordable, highly durable, and safe from hackers and disasters, including fire, floods, static electricity, and even EMPs. The metal backup offers you CCSS Level 3 compliance for high safety standards. The metal wallet backup is compatible with several crypto wallets, including Trezor wallets, Ledger Nano S, Keepkey, etc.            

Crypto Key Stack

  • Weight: 8 Ounces  
  • Dimensions: 5.87 x 4.21 x 2.13 inches 
  • Material: Anodized Stainless Steel 
  • Included: Private Electric Engraver and a Storage Bag 

Crypto Key Stuck is an outstanding metal wallet backup device to store your mnemonic seed/ passphrase. The device is designed to withstand a range of physical threats, including fire up to 2200°F, water, and corrosion. The device’s design forms a set of anodized stainless steel held together by a screw. These plates take two forms: the first plate is engraved with the numbers 1 to 14, with a space allowance for engraving the mnemonic seed. The second plate is blank, and it’s used to enclose the engraved plates or inscribe generic data. 

Crypto Key Stuck has an electric engraver to engrave your seed privately without third parties’ involvement. The engraving process takes about five minutes. Once engraved, the plates are screwed in place using an ideal tool such as a Dremel and then stored safely.      

Crypto Key Stuck can withstand corrosion from the acid bath, butane torch, and a 20-ton hydraulic press. In addition, this device comes with a storage bag and will keep your mnemonic phrase/passphrase safe at a good value for your money.     


Mnemonic phrases and passphrases are crucial in recovering your wallet in case you misplace your hardware wallet, computer, tablet, phone, hard drive, or whatever device harboring your wallet gets damaged or lost. Seed phrases usually consist of 12 to 24-word phrases that can generate all of the addresses and the private key associated with a particular wallet. Losing or forgetting your recovery seed/passphrase surmounts losing your entire crypto portfolio; thus, keeping them safe and secure is crucial.  

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While there are several means of safely storing seeds and passphrases, metal wallets stand out as they usually offer top-notch protection against hardware and software threats, including fire, extreme physical stress, flooding, hacking, etc. Therefore, you may consider the above-discussed metal wallets for the best results among the numerous wallets filling the crypto space.  

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