This forming tool produces a spring that will be about 3.9mm in diameter (O.D.) and any length to about 16mm. It is safe to use (much safer than trying to wind a spring on a mandrel chucked into a drill press) and 100% repeatable. One end will be finished and the other end will need to be manually bent so you don't stab yourself.
Creative Commons Attribution Noncommercial Share Alike
