• Highlight: The MK Diamond Zenesis 4-1/4-inch core bit brings patterned-diamond technology to a size sweet-spot for sleeve installs and 4-inch conduit pass-throughs, cutting cleanly through cured concrete and medium-to-heavy rebar on a standard coring rig.
• Best For: Plumbing and mechanical crews running 4-inch sleeves through structural floors, electrical contractors installing larger conduit through cured walls, anchor and rod-installation in reinforced concrete.
• Expert Note: The 4-1/4-inch Zenesis is sized to leave the right clearance for a 4-inch sleeve in cured concrete; the bit must be run wet on a coring rig, and a steady advance pressure is what keeps the patterned-diamond segments cutting rather than burnishing.
