DEWALT DCF813S2 12-Volt Max 3/8-Inch Impact Wrench Kit Maximum initial voltage on batteries (measured without workload) is 12-volts, measured under workload, nominal 10.8 voltage Compact, lightweight design fits into tight areas 3 LED lights provide visibility without shadows 3/8-inch Hog ring anvil, fast socket changing 1150 in/lbs of torque, power for tightening and loosening