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The MILWAUKEE TOOL 49-66-4712 is a single-end insert bit designed for use with 1/4 inch hex drive power tools and bit holders. Built from steel, this straight-style insert bit measures 1.5 inches in overall length and fits the standard 1/4 inch quick-change format used across cordless drills, impact drivers, and screwdriving tools. It is a direct-fit replacement or supplemental bit for trade professionals who need a reliable, single-piece insert for repetitive fastening tasks on the job site or in the shop.
This insert bit is suited for general fastening applications in residential and light commercial work. Electricians, plumbers, HVAC technicians, and general contractors use insert bits like this when working with bit-tip holders or magnetic bit extensions. The 1/4 inch hex shank is the universal standard for power tool bit accessories, making this compatible with the broad range of cordless and corded screwdriving platforms found in the field.
Designed as a standard 1/4 inch hex insert bit compatible with 1/4 inch quick-change bit holders, magnetic bit holders, and bit extensions used with cordless drills and impact drivers.
Insert bits are installed and removed by hand using a 1/4 inch hex bit holder or magnetic extension — no tools required for bit changes. Ensure the drive tool is powered off or the battery is removed before swapping bits on a cordless tool. Inspect the bit for wear or deformation before use, as a damaged bit can strip fastener heads and create rework.
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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