Write down your word recovery seed in order, which could be a range from 12-24 words depending on your deterministic wallet.
You may have already backed this up using a different solution already.
Go to the official bip39 master wordlist for reference.
Your bip39 deterministic wallet is referencing this dictionary before encryption takes place (2048 words).
Each one of your seed words are represented in the bip39 wordlist.
The word list was designed so that you only require the first 4 letters or less of any word.
For example number 1 on the wordlist is ‘abandon’ you would only require ‘aban’.
Each section on the card has 4 rows of 26 Dots. (a-z)
Find the first word in your list and go to the number 1 section.
The first letter needs to be center punched on the first line corresponding to the Alphabet letters on the top row.
This will make a permanent indentation in the steel card.
Repeat this process for the rest of the letters for each section, until all the sections are completed in sequential order.
A magnifying glass will help, please take your time.
Triple check all the words are correct for each section.
It’s worth testing that you can rebuild your wallet using the steel card you just created. Only then should you discard your other copy, unless this is a backup of a backup.
The two holes in the steel plates can be used in a variety of ways. You could bolt them together, put locks through them, use tamper tags, cable ties. Equally you could screw them to a permanent fixture face down somewhere discreet.
What are the additional dots for?
Each line has 26 dots which are the amount of characters in the english alphabet. You could make up a password (Dot 1 being A)or equally you could create a tricode for the cryptocurrency you have, e.g:‘BTC’ B = Dot 2, T = Dot 20, C = Dot 3.
You will have noticed the steel cards go from 1-12 only. If you have 24 seed words then you could use the spare dots as card numbers so you know which sequence to enter them in. Our original designs were upto 24 but we thought this would be an additional security measure.