Milwaukee 2666-21B Milwaukee M18 Brushless 1/2

Milwaukee M18 Brushless 1/2" High Torque Impact Wrench with Friction Ring Kit, XC 4.0 Extended Capacity Battery, Multi-Voltage Charger, and Contractor Bag - 2666-21B

SKU: 935667
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$ 374 .99 / ea
$ 709 .00 / ea
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Product Details

Manufacturer: Milwaukee Electric Tool
Product: Wrench
Tool Type: Impact Wrench
Product Collection: M18
Power: Cordless
Motor Type: Brushless
Speed Selection: Variable Speed
Battery Included: Yes
Battery Type: Lithium-ion(Li-ion)
Voltage: 18V
Charger Included: Yes
RPM: 1,750 RPM
Max Torque: 1,200 ft/lbs
Mpn # 2666-21B
Shipping Dimensions 10.6" x 4.4" x 17.4"
Weight 11.90 lbs.

About the Milwaukee M18 Brushless 1/2" High Torque Impact Wrench with Friction Ring Kit, XC 4.0 Extended Capacity Battery, Multi-Voltage Charger, and Contractor Bag - 2666-21B

Reliable power for automotive, construction, and industrial applications!


The Milwaukee 2666-21B impact wrench kit is designed for heavy-duty fastening, automotive repairs, or structural installations, giving you the strength and control to handle tough jobs with ease. With 800 ft-lbs of fastening torque and 1,200 ft-lbs of nut-busting torque, this tool effortlessly removes rusted bolts, secures lag screws into pressure-treated wood, and drives concrete anchors without hesitation. Whether you're an automotive technician needing to break free stubborn suspension bolts or a contractor tightening large fasteners in steel framing, this wrench delivers consistent power to get the job done quickly and reliably.


Designed for efficiency on fast-paced job sites, this impact wrench features a 1/2” friction ring anvil for quick, one-handed socket changes, minimizing downtime and keeping you moving from task to task. The variable speed trigger (0-1,750 RPM and 0-2,000 IPM) puts you in full control, allowing you to adjust power output based on the material and fastener type, preventing stripped threads or over-tightened bolts. If you’re working under a vehicle, inside a dimly lit workshop, or in a tight crawl space, the built-in LED light ensures visibility, so you can operate with precision in any environment.


Cord management and frequent charging slow down productivity, but with the REDLITHIUM XC4.0 battery pack, this impact wrench can drive up to (35) 6” x 1/2" lag bolts into pressure-treated lumber on a single charge, keeping you working longer without interruption. The POWERSTATE brushless motor extends tool life, while REDLINK intelligence prevents overheating and overload, ensuring reliable performance in demanding conditions. At just 8.75” long and 5.9 lbs, this high-torque impact wrench is compact and lightweight, making it comfortable for overhead work, extended use, and jobs in confined spaces. Whether you're a construction professional, mechanic, or industrial worker, the Milwaukee 2666-21B impact wrench kit offers the power, precision, and efficiency you need to handle your most challenging projects.


Milwaukee Tools is a brand built for power, precision, and durability, ensuring top-tier performance on every job. From heavy-duty construction sites to detailed workshop projects, they deliver reliability professionals trust. With innovative designs and advanced technology, each tool maximizes efficiency and ease of use and withstands the toughest conditions without compromise. When it comes to getting the job done right, you can count on their tools every time.


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  • Unleash Relentless Power to Tackle the Toughest Fasteners: Feel the surge of up to 800 ft-lbs of fastening torque and 1,200 ft-lbs of nut-busting force as you rip through rusted bolts and stubborn anchors with ease. Break free frozen fasteners that have been locked in place for years without hesitation. Whether you're securing heavy-duty lag bolts or dismantling machinery, this wrench delivers relentless force, ensuring every job is finished faster and with less strain on you.
  • Cut the Cord and Work Freely Without Limitations: Step onto the jobsite with total mobility—no cords, no air hoses, no restrictions. Powered by the M18 REDLITHIUM XC4.0 battery, you can drive up to (35) 6” x 1/2” lag bolts into pressure-treated lumber on a single charge. Work at heights, in tight corners, or across expansive worksites without stopping to find an outlet. Enjoy the freedom to move wherever the job takes you without sacrificing power.
  • Swap Sockets in an Instant and Keep Your Momentum: The 1/2” friction ring anvil allows for quick, one-handed socket changes, keeping you in the flow of work without unnecessary downtime. No more struggling with stubborn sockets or fumbling with extra tools; just seamless transitions between fasteners. Whether you’re working on vehicles, structural steel, or heavy equipment, you’ll keep moving at full speed.
  • Master Every Turn with Precision and Total Control: Squeeze the variable speed trigger and feel the power respond instantly, giving you full control over every rotation. Whether you need delicate precision at lower speeds or full-throttle performance up to 1,750 RPM and 2,000 IPM, this impact wrench adapts to your task. Tackle everything from delicate assembly work to high-torque demolition with confidence, knowing you’re always in control.
  • See Every Detail, Even in the Darkest Workspaces: No more working blind. The built-in LED light floods your workspace with bright, focused illumination, cutting through shadows in dim basements, under vehicles, or late-night job sites. Spot every bolt, thread, and surface clearly, ensuring accuracy and reducing mistakes so you can get it right the first time, every time.

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