Powerful hammer drill/driver design – made with a brushless motor to deliver runtime and power for tough applications. EC Brushless motor – efficient power that delivers 490 In.-Lbs. of torque and outstanding runtime. Rapid Mode Selection plus clutch with 20 settings – provide driving accuracy for reduced fastener damage. All-metal chuck – for more durability, along with first-rate bit retention. Great impact-to-weight ratio – weighs just 2.4 Lbs., but delivers 0-22, 000 bpm. Two-speed gearbox – choose between high-torque driving or high-speed drilling. Outstanding control – variable drilling speeds for high-speed (0-1, 900 rpm) and high torque (0-600 rpm). Ergonomic grip zone – soft grip and improved design enables better handling and greater comfort. Electronic Motor and Cell Protection – longer life in tool and battery, helps protect from overload.