The M18[TM] cordless 1/2 In. high torque impact wrench provide industry leading power in a compact size. Built with a Milwaukee[Reg] 4-pole motor and a powerful impact mechanism, the 2662-22 and 2663-22 deliver 450 ft-lbs of torque. A variable speed trigger provides speed control between 0 to 1900 RPM & 0-2200 ipm. The 2662-22 has a 1/2 In. anvil with detent pin to achieve superior socket retention, while the 2663-22 has a 1/2 In. anvil with friction ring for quick and easy one-handed socket changes.