I used a plastic blender pitcher, cause I didn't want the chance of breaking glass on the trail. Under the pitcher is a plastic blade/gear that usually engages the motor, I pulled it off. This left a 3/16 shaft, I used an air drill to drive it from my compressor. I used an air drill, cause of its variable speed. You can get fancy and built a stand, but I just use a buddy. You can use a die grinder, depending on the shaft below the pitcher (most die grinder accept a 1/4" shaft).
