Rotary Hammer Kit and Battery Voltage 18 V Chuck Style SDS-Plus Solid Bit Optimal Drilling Range in Concrete Not Specified Core Bit Capacity in Concrete 1 1/4 in Blows per Minute 0 bpm to 4650 bpm Anti-Kickback Clutch Yes Modes of Operation Hammer and Rotate Hammer Only Rotate Only Brushless Motor Yes Cordless Tool Kit Contents (1) Bare Tool (1) Charger (3) Batteries Battery Capacity 6.0Ah Core Bit Capacity 1 1/4 in Impact Energy 3.65 ft-lb