With a pen or pencil, mark the boxes with the first 4 letters of each word in your seed phrase. Place a small mark in each box corresponding with the letters on the left edge. (order of your words are indicated by the numbers at the top edge) Double check each letter and word. Why only the first 4 letters?
Using an automatic center punch, place the tip at each of your markings and press down firmly until you hear an audible "click". This will make a physical and permanent indentation in each box.We recommend picking up a center punch from your local hardware store or at an online marketplace.
Wipe the markings off with a damp cloth. (Use rubbing alcohol or nail polish remover if you end up using a permanent marker - Thanks Taylor!) Repeat on the backside with your remaining words. Store your Blockplate in a secure, hidden location. Don't forget where you put it!