The M18 Cordless LITHIUM-ION 1/2" High Torque Impact Wrenches provide industry leading power in a compact size. Built with a Milwaukee 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 0-1900 RPM & 0-2200 IPM. The 2662-22 has a 1/2" anvil with detent pin to achieve superior socket retention, while the 2663-22 has a 1/2"anvil with friction ring for quick and easy one-handed socket changes.