Diamond Core Bit - X300 - Hard Concrete

Engineered for HVAC installers drilling duct penetrations through structural concrete and reinforced basement walls, this 4-inch X300 diamond core bit handles hard aggregate without hesitation. The .155-inch segment height and 1 1/4-7 thread connection deliver consistent performance in high-compressive-strength concrete where standard bits bog down. Diamond Vantage designed this bit for wet coring applications where clean holes and tool longevity matter more than speed. The X300 segment formula cuts through river rock and trap rock aggregate common in commercial pours. Fits standard core drill rigs with compatible arbor threading. Built for mechanical contractors and plumbing crews running multiple holes per day in cured structural concrete.