The power to trim over 250 cases an hour. Economical power trimming for reloaders who already own Lyman's original Universal Trimmer. Quickly convert to power trimming. Replace the existing trimmer shaft with the power adapter shaft and attach your drill. You're ready to power trim over 250 cases an hour. The adapter shaft comes with its own cutter and stop collars so you can convert back and forth from power to hand operation. The power adapter only fits the Lyman Universal Trimmer.