• 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.
If you own any cryptocurrency and have secured it in a hardware or software wallet, you'll be familiar with your recovery phrase or seed phrase. A seed phrase is a list of 12 or 24 words generated from a list of 2048 unique words. It is essentially the password to access your crypto portfolio stored on a specific wallet.
Your seed phrase is most likely written on a piece of paper and hidden somewhere in your house. However, this seed phrase is essentially a password. If you lose this, or it is destroyed, you can lose access to your crypto. The question is, are you comfortable having the worth of your crypto investment guarded by a piece of paper? What if there was a house fire? Flooding? Burst pipe? The ink fades? Someone finds it and discards it unknowingly? Pets or pests come across it? And so on..
You need your phrases to be stored in an analogue manner, completely offline, in a material that can withstand whatever the elements or freak accidents can throw at it. In addition, if you were to ever need to recover your wallet, you need to be able to read these phrases back in the exact same order, letter for letter word for word.
At the same time, only you can imprint your phrases onto this material, since if you asked a company to engrave your phrases on a piece of metal, they now have seen your phrases.
Our solution is the Attenuo Seed Phrase Storage Plate with an included automatic centre punch which you can use yourself to permanently mark the steel. The plate is 3mm thick marine grade 316 stainless steel sheet with no moving parts, made in the UK.
The sheet has a grid physically etched into it (not just a surface mark) that allows you to use a centre punch to permanently indent your seed phrases into it.
It will survive house fires, corrosion, flooding.. pretty much whatever you can throw at it in order to secure your seed phrases for life.
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.
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.
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.
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.
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.
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.