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Seed Phrase Storage Plate (Punch Included)

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• Made in the UK.
• 3mm thick marine grade 316 stainless steel.
• No moving parts.
• Protects against fire damage, water damage, corrosion, ink fade, accidental discarding, being ripped up or chewed up by pests.
• Stores 12 or 24 word seed phrases.
• Compatible with all BIP39 wallets including Ledger, Trezor, Coldcard, KeepKey, Ellipa, Coinbase Wallet, Exodus and MetaMask.

What's Included:
1x Etched stainless steel sheet (marked 1-12 front and 13-24 back)
1x Automatic centre punch

The simplest and most effective way of permanently storing your seed phrases. Simply take the included centre punch and mark out your 12-24 seed phrases on the grid. The sheet is marked front and back, so it can accommodate 12 or 24 phrase seed phrases. Full instructions are included along with an instruction video. Guaranteed compatibility with all main brand hardware wallets.
Delivery is free in the UK. Orders typically take 2-4 working days to arrive.

International delivery is available and typically takes 8-12 workings days. If your country isn't an option at checkout send an email to and we'll see if we can add it.

Graded a for all categories in the Jason Lopp Metal Bitcoin Seed Storage Reviews


How do I mark the steel?
An automatic centre punch is included which creates a dent in the sheet. It's simple and safe to use. All you do is position it in the centre of the square you want to mark, making sure it is perpendicular to the sheet so it doesn't slip. Then press firmly down on the punch and it will fire the hardened tip into the steel sheet. If you haven't used one before, try it out first on a hard surface you don't mind getting marked e.g. an old chopping board.
What if the grid gets rubbed off?
The grid is physically etched into the steel, not just a surface mark. This means it won't rub off.
Why are there only 4 columns for the phrases? Some of my phrases have more than 4 letters.
The BIP39 word list comprises of 2048 words between three and eight letters long. The way the phrases are designed, the first four letters of each word are enough to uniquely identify it. For example, if the word is “calm” there is no “calmly” on the list. Or if it’s “combine” there is no “comb”. This means you only need to store the first 4 letters of your phrases, hence why the sheet is only marked with four sub columns per phrase. In the event you need to use this sheet to recover your wallet, you can search for “BIP39” (or use this link) and use this to cross reference these four letters to find the full phrase, or confirm it is a four letter phrase. If you have three letter phrases, mark the three letters and leave the fourth sub column blank.
Where do I access the BIP39 wordlist?
The list is accessible here:
Why can't I just save the phrases on a USB or my computer?
Any device connected to the internet is a risk of being compromised. The phrases must be created and stored offline. Even if you just save the file on a USB and then unplug your USB, you can't guarantee that your phrases are compromised. Also electronics are fragile to the elements, stainless steel isn't.
Why stainless steel?
Stainless steel offers a great combination of protection from the elements, whilst being tough and durable without costing as much as more exotic metals. Grade 316 was specifically chosen as it offers more protection against corrosion than lower grades whilst maintaining a melting point of around 1400°C. For reference, standard house fires are estimated to get to temperatures around 815°C.
What's included?
1x Etched stainless steel sheet (marked 1-12 front and 13-24 back) 1x Automatic centre punch.
Attenuo is a UK owned small business. We are working with UK ISO accredited manufacturers & supply chain to ensure the quality of the product is the best it can be.
Customer Reviews
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    United Kingdom United Kingdom
    I recommend this product

    Great product

    Well built product. Fast delivery.

    Peter B.
    United Kingdom United Kingdom
    I recommend this product

    Solid, Secure, Permanent

    I was surprised by the thickness of metal and overall quality of this item. It will definitely outlast me and forms a permanent record that can and will most likely be handed to subsequent generations.