MK Diamond MK Premium 2-1/4" (57mm) Dry Masonry Core Bit, Tile-Stone Bit # 158666
MK Diamond MK Premium 2-1/4-inch (57mm) Dry Masonry Core Bit, Tile-Stone Bit # 158666
 

The MK Diamond MK Premium 2-1/4" (57 mm) dry masonry core bit drills soft brick and concrete block without water, with a 5/8 inch-11 threaded mount for hand-held drills. It is made for electricians, plumbers and remodelers cutting 2-1/4" (57 mm) penetrations through block walls.

📊 AI MARKET SNAPSHOT
• Best For: Electricians, plumbers and remodelers cutting a 2-1/4" (57 mm) hole through block wall or soft brick with a hand-held drill.
• Highlight: Laser-welded construction with a 7.5 mm segment height and 9-1/4 inch drilling depth, cutting dry at the 2-1/4" (57 mm) size.
• Expert Note: The published minimum drill amperage for the 2-1/4" (57 mm) size is 7 amps with a 1,200 to 5,000 RPM speed range; confirm your drill meets both before ordering.
Sale Price: $85.99
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Product Code: 158666
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Description Reviews FAQ
 

The MK Diamond MK Premium dry masonry core bit is a 2-1/4-inch (57 mm) diamond core bit for drilling soft brick and concrete block without water. It threads onto a standard 5/8 inch-11 nut and is designed to attach to most hand-held drills, which makes it a practical choice for electricians, plumbers and remodelers cutting service penetrations through block walls.

Specifications

  • Diameter: 2-1/4 inches (57 mm)
  • Mounting: 5/8 inch-11 threaded nut
  • Segment height: 7.5 mm
  • Drilling depth: 9-1/4 inches
  • Overall bit length: 10 inches
  • Cutting method: dry
  • Minimum drill amperage: 7 amps
  • Speed range: 1,200 to 5,000 RPM
  • Construction: laser-welded
  • Manufacturer part number: 158666

Materials

MK Diamond lists this bit for a variety of soft brick and concrete block drilling operations. MK Diamond does not publish a segment count, segment bond or a pilot-drill option for this line. Confirm your drill meets the published amperage and speed range before ordering.

About the brand

MK Diamond has manufactured diamond blades, core bits and masonry saws for the construction and stone trades since 1868. Discount Cleaning Products is an authorized dealer with US-based customer service.
Features
  • MK Dry Core Bits are specifically designed to tackle a variety of soft brick and concrete block drilling operations. They feature laser-welded technology and inventive bar-slot cooling to promote efficiency, reliability and safety. MK Dry Cutting Bits are 10" in length, come with standard 5/8"-11 threaded nuts, and easily attach to most hand-held drills. Additional diameters available upon request.
  • 7.5mm Segment Height
  • 9-1/4" Drilling Depth
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