Here's my take on the humble die holder.
The holder i got with a cheap tap and die set wasn't too great and once i tried to thread a 10mm bar it split in half.
So being a cheapskate i decided to just make my own from scrap 6061 aluminium i had lying around.
Drew up the design in cad/cam and machined it on the cnc. ally was 15mm thick and i cut it out using a 1/8" endmill.
Can share the dxf if anyone likes, was drawn in vcarve pro.