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The MILWAUKEE TOOL 49-66-6701 is a 6-inch socket extension designed to increase reach when driving fasteners with a socket wrench. It fits between the ratchet handle and the socket, allowing technicians to access recessed or hard-to-reach fasteners in tight spaces. At 0.14 pounds, it is a lightweight addition to a tool kit. Electricians, HVAC technicians, plumbers, and general mechanical trades use socket extensions daily during equipment installation, panel work, and service calls where standard-length drives fall short.
This extension is suited for professional trade use across residential and commercial job sites. It is commonly used when servicing HVAC equipment, electrical panels, plumbing fixtures, and mechanical assemblies where bolt heads sit below surface level or inside recessed cavities. The 6-inch length provides a useful middle-ground reach without the flex or wobble associated with longer extensions.
Designed as an OEM-style replacement or direct-fit socket extension for use with standard socket wrench drive systems common in trade and mechanical service applications.
Socket extensions are installed and removed by hand — no additional tools are required. Ensure the drive end seats fully into the ratchet and the socket seats fully onto the extension before applying torque. Inspect the extension for cracks or deformation before each use and remove from service if damage is found.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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