• Best For: Wet drilling 2-3/4-inch (70mm) holes in concrete and asphalt when a 3-inch core would be oversized.
• Highlight: The 70mm 156327 is the last MK Yellow size below 3 inches, one quarter-inch under the 3-inch 156328.
• Expert Note: Per inch of depth a 2-3/4-inch core removes about 1.9 times the material of a 2-inch core, so budget water and feed rate accordingly.
