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The MILWAUKEE TOOL 49-16-1667 is a socket adapter that converts a 1/4 inch square male drive to a 1/2 inch hex female drive. Machined from steel with a gunmetal finish, this adapter measures 1-3/8 inches in overall length and weighs 0.11 pounds. It is designed for use with power tools, impact drivers, and hand ratchets where drive size conversion is required. Electricians, plumbers, HVAC technicians, and general trade professionals reach for this type of adapter when switching between socket sets or driving fasteners with mismatched drive tooling. The compact length keeps the tool profile low in tight work areas.
This adapter is suited for both residential and light commercial service work. It fits into tool kits where a technician needs to run a 1/2 inch hex-shank socket or bit using a 1/4 inch square drive ratchet or extension. Common install scenarios include panel work, pipe flange fastening, equipment mounting, and mechanical assembly where multiple drive sizes are needed from a single tool. The steel construction holds up to repeated use in field conditions.
Designed as an OEM-style drive adapter compatible with standard 1/4 inch square drive ratchets and extensions paired with 1/2 inch hex-shank sockets and power tool accessories.
This adapter is installed by hand — no special tools required. Ensure the square drive is fully seated in the ratchet or extension before applying torque. Inspect the adapter for wear or deformation before each use, particularly when used with impact drivers. De-energize or lock out any equipment before accessing fasteners in electrical or mechanical panels.
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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