The Milwaukee® THUNDERBOLT® 3/8" Titanium Coated Drill Bit (Model 48-89-2221) is engineered for professional electricians and contractors who demand reliability on every job site. Whether you're drilling through wood, metal, or PVC conduit, this bit delivers fast, accurate holes with minimal effort — reducing fatigue during high-volume installations. The titanium coating extends bit life up to 3X longer than standard bits, keeping your crew productive and your tool costs down. A must-have for any electrical rough-in, panel work, or fixture mounting application.

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