Drill trigger holder

Collar that tighten around the drill trigger to hold it down. The tension is adjustable using nut-screw and wrench.

I use this with my drill coffee grinder adapter to keep to drill running hand-free. 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/233329-comandante-c40-drill-adapter-v2