3.5" Inch Diamond Wet Core Drill Bit 1-1/4” Threaded by BLUEROCK Tools for Concrete Rebar Asphalt Brick Rock Masonry Hole Barrel Coring 3-1/2" - Amazon.com
60" Diameter Premium Black Extra-Long Life Core Bit – KOR-IT Inc
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BLUEROCK DRY Type 1.5", 2.5", 3.5", 4.5" Set Diamond Coring Bit - Concrete Core Drill - PACKAGE DEAL - BLUEROCK Tools
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