Comandante C40 Drill Adapter V2 use collar with screw-nut to grip the side of the grinder instead of using inner shaft.
The cutout on the drill interface fit this drill specifically: DELTON PRO-S-28V
You can modify the model to fit the drill you need.
Additional hardware requirement
- M6 nut & screw (max screw length included screw head: 40mm)
- 2 Comandante rubber bands
- 5.5mm hex nut driver bits
The adjustable tensioner came in handy for when grinding coffee. Grinding coffee at lower RPM producer more consistence grind size.
https://www.printables.com/model/233331-drill-trigger-holder
The author hasn't provided the model origin yet.