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The Milwaukee Electric Tool Corp 48-89-2211 is a 7/32-inch Thunderbolt titanium drill bit designed for general-purpose drilling in wood and metal. The bit features a titanium oxide coating that extends service life up to three times longer than standard high-speed steel bits. A 135-degree split point tip allows fast, accurate starts without walking or center-punching the workpiece first. The Thunderbolt core construction is engineered to resist breaking under load, making this bit well suited for repeated use in both corded and cordless drills on the job site.
This drill bit is intended for trade professionals and skilled DIYers who need reliable performance across a range of common materials including wood, sheet metal, and light steel. Its cordless-drill-friendly design makes it practical for electricians, HVAC technicians, plumbers, and general contractors who drill pilot holes, clearance holes, and mounting holes throughout the workday. The 7/32-inch diameter is a common size for conduit knockouts, screw clearance, and anchor pilot applications.
Designed for general-purpose use in standard 3/8-inch or 1/2-inch chuck cordless and corded drills. Compatible with common drill chuck sizes used across residential and light commercial trade applications in wood and metal.
Installation is performed by qualified tradespeople using standard drill equipment. Ensure the chuck is fully tightened and the workpiece is secured before drilling. Use appropriate cutting speed for the material being drilled — slower speeds are recommended for harder metals to prevent overheating the tip. Wear appropriate eye protection per OSHA general industry standards when drilling metal or wood.
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