DeWalt DCF899P2-XE XR 18V Li-Ion Cordless 1/2" Drive High Torque Impact Wrench With Pin Detent 5.0Ah Kit | Alliance Hardware
DEWALT DCF899P2-20V MAX* XR Brushless High Torque 1/2" Impact Wrench Kit w/Detent Anvil Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18.
DeWalt DCF899P2 18v XR High Torque Impact Wrench 2 X 5.0AH | eBay