The 8 Best Core Drill Bits

Updated March 10, 2017 by Chase Brush

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We spent 26 hours on research, videography, and editing, to review the top choices for this wiki. Designed for boring into tough materials like concrete and stone, coring drill bits are capable of going where your standard set just can't. Offering both wet and dry functionality and several different width and depth options, the models on this list are suitable for a variety of applications, and are sure to satisfy professional contractors and DIY-ers alike. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best core drill bit on Amazon.

8. BQLZR Diamond Coated

These 4mm BQLZR Diamond Coated bits are uniquely suited for putting clean, quick holes in more delicate materials like glass and marble tile. They're extremely inexpensive, and are a good item to keep around the workbench for whenever you need them.
  • come in a pack of 10
  • resist chipping and broken edges
  • may wear out quickly
Model N12140
Weight 1 ounces
Rating 4.1 / 5.0

7. Concord Blades CBW02500SP

With a huge 14-inch-long tube, the Concord Blades CBW02500SP represents one of the deepest-penetrating models on this list. Its smooth sides help reduce drag, allowing it to quickly make narrow holes in thick walls and floors for wiring and electrical components.
  • laser welded segments
  • does not include pilot bit
  • for wet drilling only
Brand Concord Blades
Model CBW02500SP
Weight 4 pounds
Rating 3.6 / 5.0

6. Steel Dragon Tools

The large 8-inch diameter of the Steel Dragon Tools makes this unit great for getting bigger jobs done fast, such as putting fence posts in asphalt or pavement driveways. It's laser-welded for longevity, and is backed by a one-year warranty against manufacturer defects.
  • extra tall 10mm segment height
  • fairly expensive option
  • must be used with water
Brand Steel Dragon Tools
Model pending
Weight 16.2 pounds
Rating 3.9 / 5.0

5. Bosch Speedcore T3914SC

With high-grade tungsten carbide teeth and an integrated pilot bit for easy-entrance drilling, the Bosch Speedcore T3914SC is a capable option for masonry professionals on the go. It will easily cut through thick concrete walls, though it does require a hammer drill.
  • ejector hole for easy removal
  • works with other brand's extensions
  • not as deep as other models
Brand Bosch
Model T3914SC
Weight 12 ounces
Rating 4.2 / 5.0

4. EDiamondTools Dry Threaded

The EDiamondTools Dry Threaded is a strong diamond-tipped piece for grinding through soft stone materials, such as cinder block and brick. It's also fairly long, allowing you to penetrate a whole 9.5 inches deep, but it isn't recommended for use on solid concrete.
  • wide 4-inch diameter
  • tough blue finish
  • durable construction
Brand EDiamondTools
Model pending
Weight pending
Rating 3.9 / 5.0

3. Toolocity Monster SCB0138D

The Toolocity Monster SCB0138D fits on most polishers and grinders, can be used wet or dry, and is durable enough to last you through several jobs before wearing out. Plus, it's exact enough to cut through porcelain tile without breaking or chipping it.
  • very fast cutting action
  • great value for the price
  • works best at 3000 to 6000 rpm
Brand Toolocity
Model SCB0138D
Weight 8.8 ounces
Rating 4.5 / 5.0

2. Damo Dry/Wet

The Damo Dry/Wet is a heavy-duty item that features a vacuum-brazed end, making it hold up particularly well against hard granite and engineered stone. Capable of being used with or without water, it's perfect for a wide range of applications.
  • fits on high-speed angle grinders
  • 11000 rpm max speed
  • good for making holes in countertops
Brand DAMO
Model pending
Weight 5.6 ounces
Rating 4.6 / 5.0

1. Concord Blades CBD04000HP

Come prepared to any job with the Concord Blades CBD04000HP, which is a general purpose option that can be used on everything from soft stone to concrete. The specially-designed barrel vents help increase air flow and dissipate heat, keeping it cool in any environment.
  • 10mm segment height
  • good for dry or wet use
  • comes in a large range of sizes
Brand Concord Blades
Model CBD04000HP
Weight 4.4 pounds
Rating 4.9 / 5.0

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Last updated on March 10, 2017 by Chase Brush

Chase is a freelance journalist with experience working in the areas of politics and public policy. Currently based in Brooklyn, NY, he is also a hopeless itinerant continually awaiting his next Great Escape.

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