Cordless Hammer Drill Voltage 12V Cordless Drill Class Compact Premium Chuck Size 1/2 in Drilling Capacity in Concrete 3/8 in Drilling Capacity in Wood 1 1/4 in Number of Speed Settings 2 Number of Clutch Settings 12 Maximum Working Torque 400 in-lb Blows per Minute 0 to 22 500 Maximum Blows per Minute 22 500 bpm Minimum Blows per Minute 0 bpm Brushless Motor Yes Cordless Tool Kit Contents (2) Batteries Battery Capacity (1) 2.0 Ah (1) 4.0 Ah Battery Model Number 38D763 38D764