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      Board S

      $26.99 USD
    • ⠀flight FREE SHIPPING
    • Unit price  per 
      Secure your crypto investment by punching your seedphrase into a pocket-sized, grade 304 stainless steel plate which will create a permanent offline backup of your coins. This product works with a single center punch tool.

      The Board S offers added discreteness and simple design with laser-etched guides. Don't underestimate its toughness! It's made to last for a lifetime.

      local_fire_department Fireproof (Up to 1450°C/2642°F)
      opacity Waterproof (No rust/corrosion)
      flash_on Shockproof (14GA. sheet)
      security Hackerproof (Digitally unreachable)
      code Open-Source (Public template)

      SKU: BS-304/24

      Individual plate:

      • Material: AISI 304 Stainless Steel
      • Gauge: GA. 14
      • Dimensions: 93x80x2 mm
      • Weight: 110g (0.24lbs)
      • Finish: Matte 2B


      Punching tool:

      • Brand/model: Truper® 12218
      • Material: Cr-V Steel
      • Hardness: 53HRc
      • Point angle: 90º
      • Dimensions: 108x6 mm (4¼x¼")
      • You will need:
      • Pen and paper
      • A hammer/mallet (16oz/0.5Kg min.)
      • A flat and sturdy surface
      • Eye and ear protection


      1. Convert your seed into numbers

      By comparing each word with the BIP39 standard, you can convert them all into a unique number.

      2. Find a flat/sturdy surface

      You’ll need a heavy hammer/mallet for this job and the flattest surface you can find near you.

      3. Prefill the board

      Grab a marker and prefill all the cells where you have to punch.

      4. Punch the numbers

      Take the center punch tool and give one single good hit into every mark you made.


      View full instructions

      • 1, 2, 3 or 4 boards
      • Center Punch Tool (If selected)
      • Product Tag and Quick Guide
      • BIP39 conversion card(s)
      • Paper BIP39 English wordlist

      We ship our products worldwide via Registered Mail (standard air mail). Orders may take up to 4 business days to get dispatched after you buy. We also provide a tracking number.

      Works best with

      Ledger Nano Wallet logo compatible with the stainless steel crypto backup Plate S by CryptoNumeris
      Trezor Wallet logo compatible with the stainless steel crypto backup Plate S by CryptoNumeris

      Got any questions?

      The main goal is safety and longevity. By stamping/punching your seedphrase into a piece of grade 304 stainless steel, you are minimizing the risk of an accident that may occur with a piece of paper, such as a natural disaster that may turn your key illegible. It also lowers the chance of hacking: the nature of the backup (a physical object) implies it is not reachable via the Internet or any other digital medium. You immortalize your crypto wallet with a deep cold state solution.

      Why? This method of backup works extremely well for two simple reasons: It makes use of a standardized method (BIP39) and utilizes a high quality material that can last for hundreds of years (stainless steel).

      How? By stamping/punching your seedphrase (which is essentially a very long password that represents your private key) into a super long-lasting piece of steel, you are actively creating a timeless copy of your coins and securing them forever.

      No. You never have to share your key with anyone at any point of the process. We provide the backup solution and the tools needed for each customer to complete it in their own privacy. Our products are 100% trustless and non-custodial. (Privacy)

      This grade of steel is highly durable and prevents any kind of rust/corrosion. It will also withstand high temperatures (1450°C/2642°F) and shock.

      The only way you can leave a mark into the steel is by using specialized tools like a hammer and hardened steel stamps.

      We have put our products to the test:

      Nothing happens. The status of our business does not affect the functionality of the products we sell in any way. The BIP39 standard is open to the public and we just provide a backup solution of it. Once you setup your backup you are the only and true owner of it.

      Guaranteed Quality

      All of our products are designed to last for a lifetime.

      Worldwide Shipping

      We can ship to every country in the world via Registered Mail.

      Safe Shopping

      Our entire webstore has SSL encryption, you're safe.


      Our products don't rely in trust, you own your private key.