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The Milwaukee Electric Tool Corp 48-89-2310 is a RED HELIX cobalt drill bit designed for drilling through hard metals, stainless steel, and other demanding materials where standard high-speed steel bits fall short. The cobalt construction provides superior heat resistance and extended edge retention under continuous cutting loads. This 13/64-inch bit is sold in a 5-pack, making it a practical choice for shops and field technicians who cycle through tooling regularly. Licensed tradespeople in HVAC, plumbing, and electrical work rely on cobalt-grade bits for self-tapping screw pilot holes, conduit knockouts, and equipment mounting applications.
This bit is suited for both shop-bench and field use across residential and light commercial applications. The 13/64-inch diameter is a common sizing for pilot holes and clearance drilling in metal fabrication and mechanical installation work. It is packaged in a unit of 5, supporting tool-crib stocking or van inventory for service technicians who need reliable replacements on hand.
Designed as a replacement or stocking cobalt drill bit for use in standard drill chucks accepting 13/64-inch round-shank bits.
Cobalt drill bits should be used with a drill press or corded drill capable of maintaining consistent speed and feed pressure for best results. Use appropriate cutting fluid when drilling hardened steel or stainless to extend bit life and reduce heat buildup. Ensure workpieces are properly secured before drilling. Dispose of worn bits according to local sharp-material handling guidelines.
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