Itβs not what you think!π I made these for my β37 Chevy Cabriolet from some 0.156β Evergreen rod. I clamped a short section of scrap photo etch saw blade in a pair of forceps and just pushed it against the spinning Evergreen to scrape the circular pattern on the end. Then used the jaws of the drill as a guage for cutting the pad loose.
Edit: You could make vintage brake and clutch pedals like this maybe.