The M18 Cordless Lithium-ion 1/2" High-Torque Impact Wrench features a Milwaukee 4-pole motor and powerful impact mechanism to deliver a reliable 450 ft-lbs of torque with maximum runtime. You'll get consistent speed control between 0-1900 RPM and 0-2200 IPM with the variable-speed trigger. A 1/2" anvil with friction ring allows quick and easy one-handed socket changes.