The most powerful fein cordless drilldriver with brushless motor 4 speed gearbox and removable drill chuck key features4 speed solid metal gearbox brushless fein power drive motor with 30 higher efficiency lithium ion storage battery with fein safety cell technology aseparate communication cable protects the battery and tool fromoverload3 year fein plus warranty including battery and charger removable solid metal drill chuck bit holder electronic torque setting motor and electronics have full du