Oven or Constant Light
I got it from a welder in my location.

I am wondering how wasn’t clear what a washer is and how bit it is.
I also wrote in the article the actual size.
To be honest those look quite similar to barbell weights, but isn’t a bold the object peeking in the bottom right of the picture? Is that a giant bolt?
In addition to that, what is the oven story?
I smile sir. Sir please don't be confused. Although I did not explain the irons well for easy understanding. I was trying to give example of my understanding of your thread that, I got a similar disk from a welder. I Know for sure that they are not washers but washer look alike. And also they are bigger than washer. They are barbell weights, even though the welder uses them to print the seed phrase, I believe I can't secure or hide the seed phrase because it is too big to hide seed phrase.
The Oven
As for the oven. I was trying to say that, from your presentation, you gave the examples of the tools used in printing the seed phrase, I know before you print the seed, you must heat (make it hot) your Stamps either by light, gas, stove or charcoal to make it very hot before using the anvil and the hammer to make the printing less stressful.
Finally
I really appreciate your presentation and also today I came to know about washers which can be used to secure seed phrase although it will be very difficult for me to have washer in my village but that not withstanding I can use someone else to secure my phrase and also present it here. So don't be confused. I am your boy that always learning from you.