J.H. Benedict tool makers machined a cylindrical coil die, mounted it to a lathe and formed a piece of stainless steel tubing. This work is a testament to the know-how and ingenuity of these skilled tradesmen. Not only did they come up with the plan, they executed it. A plan that included changing the gearing on the lathe to accommodate the coil pitch. This is both skill and art for those who can appreciate it. Enjoy.
Roman Zapata and his final routine Bar Fighters 2016 https://www.barfighters.pl