Cordless Impact Wrench Kits Cordless Impact Wrench Kit Drive Size 1/2 In. Drive Configuration Straight Max Torque 400 ft.-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 2700 Max No Load RPM 1650 Cordless Handle Type Soft Grip T Battery Capacity 4.0Ah Tool Length 11 In. Tool Weight 6.8 lb. Battery Included (2) 21RV47 Battery Pack Replacement 21RV47