This kit features a powerful hammer drill with advanced features, two 18 V 4.0 Ah FatPack batteries and an 18 V fast charger. It features kickback control and a precision clutch. It is an integrated acceleration sensor that automatically shuts the tool down when a potentially dangerous rotational torque reaction occurs in a bind-up scenario. The precision clutch has 25+1 settings, for longer tool life and accurate fastener driving with reduced overtightening. The tool has an upgraded and durable all-metal chuck, and it delivers outstanding bit grip and torque transfer. The efficient EC Brushless motor delivers outstanding runtime and longer motor life. It produces up to 663 In.-Lbs. of torque, a no-load BPM of 0-31,500 and a no-load RPM of 0-2,100 RPM.