Getting your seed phrase onto your Hodlinox plates is very easy, either use a handheld engraver such as the
Dremel 290 or
If you prefer to stamp the letters, we recommend a letter height of 5mm (0.2 inch).
Always engrave your seed phrase yourself; do not ask someone else to do this for you.
Write down words with a permanent marker
Step 1: set up temporarily with a marker
Waterproof marker pen
Write your seed phrase on the plate(s) using a waterproof marker pen.
- Double plates: the first plate has a grid that’s numbered 1-12, the second plate is numbered 13-24.
- Single plate: the front is numbered 1-12, the back is numbered 13-24.
Next, check your seed phrase to make sure you haven’t made any mistakes.
Tip: because the first 4 letters of each word in your seed phrase are unique, you can also choose to engrave only the first 4 letters of each word onto the plates. You don’t necessarily need to put down the entire word.
Engrave the seed phrase onto the metal plates
Step 2: trace with engraving pen
This is very easy and engraving a 24-word seed phrase only takes about 10 minutes. Using an engraver is like writing with a large pen and it doesn’t require any special skills, practice or additional tools.
It’s not recommended to use a battery-operated engraving pen. These pens have less power and their engravings are too superficial.
You can also punch the letters with a letter punching set, we recommend a letter height of approximately 5mm or 0.2 inch.
Make sure that your hammer is sufficiently heavy and use a sturdy, flat surface.
Always test recovery from the seed phrase before transferring large amounts to your wallet.
Lock plates together
Step 3: lock with security seal
Interlocking plates: Slide the opposing sides of both plates into each other and hook the padlock seal through the slotted hole.
Single plate: Slide the plate into its case and hook the padlock seal through the hole in the plate.
Store the unique code on the seal (or a photo of it) in a safe place, such as a password manager. Don’t store the seal serial number in the same location as your plates.
Hodlinox seals are tamper-evident, can only be used once, are numbered sequentially and can’t be removed without being damaged.
With the seal in place, you can allow trusted third parties to handle the plates on your behalf while you will always be able to verify that the seed phrase has not been exposed to anyone else.
Store the plates somewhere safe (e.g. with a trusted family member) in a different geographical location than your hardware wallet.
Removing the seal can be done with wire cutters or universal pliers.