Core Bore Heavy Duty Drill Bit 3. The item "Core Bore Heavy Duty Drill Bit 3" is in sale since Sunday, May 31, 2020. This item is in the category "Business & Industrial\Light Equipment & Tools\Drills & Hammers\Core Drills & Rigs". The seller is "pfitz904" and is located in Jacksonville, Florida. This item can be shipped to United States.