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The Milwaukee Electric Tool Corp 48-89-4644 is a 4-piece SHOCKWAVE RED HELIX drill bit set engineered for high-demand drilling applications in metal, wood, and plastic. Manufactured from high-speed steel, each bit features a red helix geometry designed to reduce heat buildup, clear chips faster, and extend bit life under continuous use. The 0.25 inch hex shank is compatible with standard impact drivers as well as conventional drill chucks, making this set versatile for electricians, plumbers, HVAC technicians, and general trade professionals who regularly switch between fastening and drilling tasks.
This set is suited for residential and light commercial trade work where a compact, impact-rated drill bit set is needed at the tool belt or in a service bag. The 0.25 inch hex shank design allows quick bit changes in impact drivers without a separate chuck adapter. The red helix geometry accelerates material removal compared to standard twist geometries, reducing time on repetitive pilot hole and through-hole drilling tasks common in electrical rough-in, plumbing penetrations, and HVAC duct or equipment installations.
Designed for use with standard 0.25 inch hex-drive impact drivers and keyed or keyless drill chucks. Suitable for trade professionals using cordless impact drivers for drilling and fastening applications.
Secure the hex shank fully into the impact driver or drill chuck before operation. When drilling into metal, use appropriate cutting fluid to extend bit life and reduce heat. Always wear eye protection when drilling. Follow applicable jobsite safety codes when drilling near electrical, plumbing, or gas lines.
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