Cordless Hammer Drill/Driver, Voltage 18.0 V, Battery Included, Chuck Size 1/2 in, Brushless Motor No, No Load RPM 0 to 600/0 to 1900, Blows per Minute 0 to 9000/0 to 28,500, Max. Torque 480 in-lb, Max. Power 400W, Battery Included (2) 33RT41, Cordless Tool Battery Type Li-Ion, Battery Capacity 2.0Ah, Series 18V LXT, Tool Length 7 3/4 in, Tool Weight 3.4 lb, Clutch Style Adjustable, Handle Type Pistol Grip, Battery Pack Replacement 4NNN2