This accessory is perfect for the reloader looking to speed up the case trimming process while they are using their Forster Case Trimmer. Simply remove the handle from the case trimmer and replace it with this adapter then use any electric screwdriver or power drill to provide all the power. The cutter shaft and stop collar are unchanged so accurate case length settings are maintained. For use with Forster Case Trimmers (sold separately) Function: Turns the trimmer into an electric trimmer with the addition of a cordless screwdriver or drill (not included) Notes: Power source will need to be supported to keep the trimmer level, adapter will also work with Forster's deburring too.