An inexpensive 6 amp Black & Decker drill with cord. Ref: level of torque I cannot tell you for sure, but once a case is wedged between the outer wall and the caliber disc, you cannot move it at all with your hands. The drill works very well as does the hand crank, but you can get so much more done with the drill and not be fatigued. As stated previously in my earlier posts, I was having some stripping and even had a hex bit snap, but I believe how I have it set up now, in the picture below I will hopefully avoid those issues going forward.