Charger Drill Bits Advanced Helix Geometry Starts At The 135 Degree Quick-Cut Point, Modified To Be Self-Feeding And Requires Less Force From The User. The Unique Flute Design Allows For Fast Chip Removal, Ensuring The Cutting Point Remains Cool, Reducing Wear For A Longer Tool Life. Drill Bits Charger Pro Grade.Charger Drill Bits Use Less Power Drill More Holes With Cordless (Per Charge) Or Electric Drills.