Invention on Instagram: "Thread rolling flywheel studs starts with a smooth steel blank rather than a pre threaded fastener. The blank is forced through hardened rolling dies while flooded with oil. Instead of cutting away material the steel is plastically deformed and flows into the thread shape leaving a fully formed stud when it exits the machine. Because the metal grain follows the contour of the threads the finished stud is stronger than one made by cutting. The process work hardens the sur