Milwaukee 2-1/2″ x 12″ Diamond Premium Wet Core Bit Extension

DEEP-PENETRATION CORING FOR HEAVY-DUTY STRUCTURAL APPLICATIONS

When you are punching through thick-metered slabs or deep structural footings, standard bit lengths often fall short of the breakthrough. The Milwaukee 48-17-4025 12-inch extension is engineered for the high-torque demands of heavy civil coring, providing the reach necessary for deep-bore applications without sacrificing axial concentricity. Designed for industry-standard 1-1/4″-7 threads, this extension handles the massive rotational force generated by MX FUEL or high-output corded core rigs. To prevent thread-lock after a full shift of wet-drilling through reinforced concrete, the application of anti-seize is mandatory—ensuring your setup remains modular and ready for the next bore in extreme jobsite environments.

• / Adds 12 inches of drilling depth for deep-hole penetration in reinforced concrete and masonry.
• / 1-1/4″-7 thread pattern ensures compatibility with heavy-duty core rigs and premium wet bits.
• / Engineered specifically for wet-use applications to maintain constant cooling and efficient slurry flush.
• / High-strength alloy steel construction maintains structural integrity under extreme rotational stress.
• / 2-1/2″ body diameter optimized for use with Milwaukee Premium Wet Core bits of equal or greater size.