Lol.....that is my custom design for race axles.....yet to be produced. I have a couple sets of awana axles that I will be cutting similar to it by hand but the precision a lathe can do cannot be matched by hand pressing a file to steel. Most the axles readily available are completely adequate for racing.....depending on stiffness, diameter, transition clearances. ....my design is the maximization of those concepts....ideally they would be made from titanium....a cheaper version could be made from regular steel...then heat hardened and tempered. Most the yuys pulling titles are cutting wheels, axles, and bodies custom. I am in the middle....custom woods and other body materials, bought custom wheels, bought custom axles (not at the level I sent you), and my own custom designed parts and design. Any questions just ask Im not a tech hoarder....yet. just keep what we share to yourself, please. Some guys will market my ideas and not compensate me for my part.