This bit is compatible with ½ inch chucks.  The shaft is oversized because of course it's plastic.

This bit allows you to fasten or loosen several atypical fasteners.

No supports are required for the print.

Materials

I recommend printing this in PLA+, PETG or Nylon with strength improving settings, such as smaller nozzle, thinner layers higher wall count, and higher infill percent. 

• Prusa Nylon CF: https://www.prusa3d.com/product/prusament-pa11-carbon-fiber-black-800g/
• Overture Easy Nylon: https://amzn.to/3ujukh3 
• Overture Super PLA+: https://amzn.to/3stq65Z 

Helper Models Used

Font: https://www.fontget.com/font/fighting-spirit-turbo-family/

Drill: https://free3d.com/3d-model/cordless-drill-v2--761243.html

Bolt & Nut: https://www.mcmaster.com/ 

Helpers were used just in renders and are not apart of this design.