A Wilson reamer does a good job removing a donut, but using the thumb/index finger rotation knob can be difficult and after a few dozen, one's hand can get tired. You can remove the handle from the neck trimmer cutter and remove the knob from the reamer. The handle doesn't screw onto the reamer, but it's snug. Screw the knob on tightly and it
fixes the handle. You now have greater mechanical advantage and reaming is so much easier.
