One of the great features of the L.E. Wilson Case Trimmer is its versatility. This power adapter allows the L. E. Wilson Case Trimmer to be used with a power drill or electric screwdriver for easy case trimming. Notes Attaches to the Wilson case trimmer after removing handle.Powered by a cordless screwdriver or drill (not included).Power source will need to be supported to keep the trimmer level7/16-20 TPI - Will fit all of L.E. Wilson Brand Cutters. Including 50 Cal and TiN cuttersOperate between 100 - 200 RPM, higher speeds can cause cutter to seize in cutter bearingKeep cutter oiled when trimming