Cordless Impact Wrench Kits, Impact Wrench Kit, Drive Size 1 in Square, Drive Configuration Square, Max. Torque 2,000 ft-lb, Battery Included, Voltage 18 V, Series M18 FUEL(TM), Cordless Tool Battery Type Li-Ion, Brushless Motor Yes, Anvil Impact Action Mechanical, Max. Blows per Minute 1440, Max. No Load RPM 1200, Cordless, Handle Type D-Handle, Battery Capacity (2) 12.0 Ah, Tool Weight 23.2 lb, Clutch Style Impact, Battery Included 481Z42, Battery Pack Replacement 481Z42