Radiator check valve knob

Made so you can adjust the check valves on your radiators when the useless knob they fit breaks.   Print at 45 degrees with support touching base. I used PLA.  50^ infill.   the knob has a 3/8 " square hole on the top for ratchets.   Reasonably strong but obviously will break if stressed too much.  I printed at original size but stretch 5% in Cura for a better fit.