Screwdriver bit for step drill

So I needed to drill a 1/2 inch hole to make some [airtight filament canisters](https://www.thingiverse.com/thing:1332650) but I had no power tools for my [step drill](https://www.amazon.ca/Bosch-SDH1-Speed-Steel-Drill/dp/B000CFNBDQ/ref=sr_1_4?ie=UTF8&qid=1481048751&sr=8-4&keywords=1%2F2+step+drill). So I designed a screwdriver bit to hold the step drill =)

It can be very strong when printed with 80% infill. However, you must apply pressure correctly (i.e. not on the x/y axis) or it may break