Milwaukee M18 2663-20 18 Volt Cordless 1/2" High Torque Impact Wrench included Overview Get the most powerful, most compact, longest-running impact wrench in its class. 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. The REDLITHIUM™ Extended Capacity Battery Pack (sold separately) delivers more work per charge and more work over pack life than the competitors, as well as best-in-class performance in extreme jobsite conditions. 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. The M18™ Impact Wrench’s onboard, real-time battery fuel gauge helps you monitor the charge precisely, so there’s less downtime on the job. Lightweight and portable, with superior ergonomics, this 18-volt cordless power tool offers ultimate comfort during prolonged use. Features Milwaukee® 4-Pole Frameless Motor: Features a robust design combined with rare-earth magnets for longer life, more power and more runtime than any brushed competitor REDLITHIUM™ Battery Technology: Superior pack construction, electronics, and performance deliver more work per charge and more work over pack life than any battery on the market REDLINK™ Intelligence: Provides optimized performance and overload protection using total system communication between tool, battery and charger Specs Anvil TypeFriction RingAnvil Size1/2"IPM0 - 2,200Fastening Torque450 ft-lbsNut-Busting Torque640 ft-lbsTool Warranty5 Year Limited WarrantyPower SourceCordlessMotor TypeBrushedLength8.9 inWeight6.7 lbsHeight8.25 inWidth2.75 inVoltage18VBattery SystemM18DRIVE CONTROL1-ModeMaximum RPM1900