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 come out as 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 phrase/ passphrases; they are the only solution to recovering lost crypto wallets. There are plenty of options for storing seed phrases and passphrases, including writing it down on paper and laminating or engraving on stone tablets and metals. But the most durable option when it comes to storing seeds and passphrases is seed storage devices. There are various metal wallet backups, and you should choose the best one. Here’s 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 in length or 4-6 words long. The device is constructed of heat and corrosion-resistant stainless steel molded in a hexagonal shape. 

Coldbit metal passphrase offers comprehensive protection against water, fire, corrosion, electrical-shocks, and pretty much any physical destruction. Nonetheless, after stamping your seed/passphrase on the Coldbit Passphrase, you need to ensure it’s stored in a safe place, preferably from the wallet seed backup.    

  • Steelwallet

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 high-end protection against fire, water, electrical-shocks, corrosions, and pretty much any physical obstacles. 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 mistake. 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 backup the seed phrase/passphrase of your crypto wallet.  

  • 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 temperature of 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 all by yourself without third parties’ involvement. It’s double-sided, with each side being able to hold 12 mnemonic phrases.  The adjustable separators enable you to store your mnemonic seed in full, plus supports 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. This means that your mnemonic seed will remain safe even in cases of 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 takes the form of a set of anodized stainless steel held together in a place 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 comes with 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 then stored safely.      

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


Mnemonic phrases and passphrases are crucial in recovering your wallets in case you misplace your hardware wallet or your 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, it’s crucial to keep them safe and secure.  

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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. Among the numerous metal wallets filling up the crypto space, you may want to consider the above-discussed metal wallets for the best results.  

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