Cordless Impact Driver Kits Cordless Impact Driver Kit Drive Size 1/4 In. Drive Configuration Straight Max Torque 1400 in.-lb. Battery Included Voltage 20.0 Series 20V MAX(TM) Cordless Tool Battery Type Li-Ion Brushless Motor No Anvil Impact Action Mechanical Max Blows per Minute 3200 Max No Load RPM 2800 Battery Capacity 4.0Ah Cordless Handle Type Pistol Grip Clutch Style Impact Battery Included (2) 21RV47 Battery Pack Replacement 21RV47