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The Milwaukee Electric Tool Corp 48-89-2320 is a RED HELIX cobalt drill bit designed for high-performance drilling in hard metals, stainless steel, and abrasive materials. The cobalt construction provides superior heat resistance compared to standard high-speed steel bits, making it well suited for sustained drilling at higher feed rates without bit degradation. This 23/64-inch diameter bit is sold in a 3-pack, offering working spares for job sites and service vehicles. It is used by electricians, plumbers, HVAC technicians, and general trade professionals who regularly drill through tough substrates during rough-in and installation work.
This bit fits standard drill chucks and is appropriate for both corded and cordless drill/drivers commonly carried on trade service vehicles. The 23/64-inch diameter is a working size frequently used when enlarging knockout holes, drilling pilot holes for fasteners in structural steel, or boring through sheet metal and angle iron. The 3-pack format reduces downtime when bits are lost or dulled on demanding materials. No special tooling or adapters are required for most standard drill chucks.
Designed as an OEM-style replacement and standard-use cobalt drill bit for use with any drill or drill/driver equipped with a standard chuck accepting round-shank bits at the 23/64-inch diameter.
Cobalt drill bits should be installed by a qualified trade professional familiar with metal-drilling procedures. Ensure the drill is powered off and the chuck key is removed before securing or changing bits. Use appropriate cutting fluid or lubricant when drilling through hardened or stainless steel to extend bit life. Eye protection and work-holding devices are required per standard shop and field safety practices.
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