The file 'Skull Manual Shifter Knob 1/2″ UNF 3D Printer Model' is (stl) file type, size is 3.4MB.
1/2 inch 20 TPI threading. You may need an adapter for aftermarket shift knobs. There are many with the 1/2 inch UNF thread you can grab that'll work perfectly with this. You can also use a bit of Loctite or Superglue to lock it in place but I managed to tighten mine enough so its sturdy. PLA or other filament could also be used but I used PLA+. Thread on the knurled nut then thread on the skull and tighten the knurled nut to the skull securely.
SkullShifter.stl | 6.7MB | |
SkullShifterKnurledNut.stl | 608.1KB |