I got one of these: https://www.amazon.com/Worlds-Finest-Trimmer-300-Blackout/dp/B00BF0J2MG/ref=sr_1_1?ie=UTF8&qid=1491790192&sr=8-1&keywords=WFT+trimmer+300

And just run it at low speed in my drill press. I also run my deburr/chamfer tools in the press. Makes quick business of the task.