Milwaukee2663-22M1818-Volt1/2" driveHighTorqueImpactWrenchwithFrictionRing. TheM18Cordless1/2" HighTorqueImpactWrenchesprovideindustryleadingpowerinacompactsize. Thecompactsizeandlightweight (8-7/8", 5.2lbs.). Milwaukee 4 pole frameless motor Robust design combined with rare earth magnets Allows for quick, hassle-free one handed socket changes Milwaukee-designed impact mechanism provides best-in-class torque at 475 foot-pounds Milwaukee four-pole motor for maximum speed and power Compact size and weight reduces user fatigue Overload protection prevents damage to the tool in abusive situations Friction ring allows quick, easy socket changes to increase productivity