Most compact and lightest weight drill/driver in class: Delivers better balance and control of the tool in tight areas * Optimized impact performance: Provides the best runtime and torque control * Torque control limits stripping of screws and helps prevent screw heads from shearing * Electronic Cell Protection (ECP): Increases battery lifetime by preventing damage caused by misuse * 1-Click Stacking: Easily lock tool cases together for easy transport and handling