This hammer drill driver set is equipped with the KickBack Control feature, which reduces the risks associated with abrupt tool reactions during fastening operations. This built-in acceleration sensor automatically turns off the tool when a potentially dangerous torque reaction occurs during a fastening operation. It is designed with a solid all metal optimized chuck that improves sturdiness and torque transfer. Thanks to its efficient EC brushless motor, this drill / driver has a longer life and a long operating life. A model belonging to the Bosch Compact Tough ™ family, the drill and driver set is a powerhouse despite its short head length and low weight.KickBack Control – reduces the risk from sudden rotational torque reaction in a bind-up scenarioUpgraded all-metal chuck – provides great bit retentionEC Brushless motor – efficient power that delivers 531 In.-lbs. of torqueCompact Tough design – short head-length and light tool, but plenty of powerErgonomic grip zone – small diameter enables better gripping and greater comfortOutstanding control – variable drilling speeds for high-speed (0-1,900 RPM) and high torque (0-600 RPM)Precision 20+1 clutch settings – provide accuracy for reduced fastener damageElectronic motor and cell protection – longer life in tool and battery, helps protect them from overloadDurashield housing – can stand up to tough jobsite conditions