• Highlight: The MK Diamond Zenesis 5-inch core bit pairs patterned-diamond technology with the right opening for 5-inch sleeves and larger conduit, drilling cleanly through cured concrete and medium-to-heavy rebar where standard bits stall on the steel.
• Best For: Plumbing and mechanical crews installing 5-inch sleeves through structural floors and walls, electrical coring for larger feeder conduit, structural anchor and tie-down work in reinforced concrete.
• Expert Note: Heavier rebar in cured concrete is what shortens the life of most core bits; the Zenesis segment pattern is built specifically to keep cutting when a bit hits steel, but water flow and a steady advance still do most of the work on a long pull.
