Milwaukee M18 1/2 in. Brushless High Torque Impact Wrench (2666-20) – Free!

At Ace Hardware This deal was spotted over 30 days ago and may be outdated.

Ace Hardware is currently offering a free M18 1/2 in. Cordless Brushless High Torque Impact Wrench (2666-20) for free with the purchase of a Milwaukee Tool kit. It's odd that the kits associated with this deal are all brushed kits, but for DIYers and others that don't mind brushed tools, this is a great deal to snag.

Eligible kits:

Impact Wrench (2666-20) Details

The Milwaukee M18 1/2 in. Cordless Brushless High Torque Impact Wrench (2666-20) is built to handle demanding fastening and bolt-removal tasks in automotive, construction, and industrial settings. Designed for pros who need serious torque without cords or air hoses, this tool delivers the performance of a pneumatic wrench with the flexibility of M18 battery power.

Outfitted with a POWERSTATE™ brushless motor, the 2666-20 provides long motor life and consistent power under load. It’s ideal for working on trucks, structural bolts, heavy equipment, and anything else that calls for high-output fastening.

The tool features Milwaukee’s REDLINK™ intelligence, which helps prevent overload and optimize battery use, while the variable speed trigger gives you more control over torque delivery. The rugged build and friction ring anvil make it easy to swap sockets quickly, even in rough jobsite conditions.

Technical Specs

  • Brand: Milwaukee
  • Model Number: 2666-20
  • Tool Type: Cordless high torque impact wrench
  • Drive Size: 1/2 in. square drive with friction ring
  • Motor: POWERSTATE™ brushless
  • Power Source: M18 battery system (battery sold separately)
  • Max Torque: [Specific ft-lbs not published; high torque class]
  • Speed Control: Variable speed trigger
  • Electronics: REDLINK™ Intelligence for performance and protection
  • Use Case: Automotive, structural, construction fastening, bolt removal

What It’s Good For

This impact wrench is ideal for breaking loose rusted or over-torqued fasteners, driving lag bolts into framing or concrete, and replacing air tools for mobile mechanics or construction teams. It’s especially useful for job sites where portability and high power are a must.

Compared to Other Milwaukee Wrenches

Compared to compact or mid-torque models like the 2855-20 or 2962-20, the 2666-20 offers more brute power for the toughest jobs but is slightly bulkier. It’s a better fit for work on heavy-duty equipment, rather than tight engine bays or overhead applications.

Also Known As

  • Milwaukee 2666-20 High Torque Impact Wrench
  • M18 Cordless 1/2 in. Brushless Impact Wrench
  • Milwaukee High Output Impact Tool
  • M18 Heavy-Duty Friction Ring Impact Wrench