In my case I took "one" hex section to the machine shop, so to save money I had one hex section machined because only one side (driver) bottomed out when I was trying to get it aligned. If I had a lathe at my house I would have done both sides myself (JUST IN CASE). I'm a machinist (retired) so I was able to cut the threaded rods with no problem because I know how to refinish and bevel the threads after cutting.