RDT 4" Diamond Drill Core Bits for Concrete Masonry Brick and Stone, Laser-Welded Wet Drill Bit, 14" Drilling Depth, 1-1/4"-7 Arbor, for Construction & DIY Home Renovation

LONG-LASTING DURABILITY Our Wet Diamond Core Drill Bits feature newly upgraded segments that cut through reinforced concrete quickly and efficiently. The advanced design maximizes drilling speed while reducing friction and wear, helping extend the bits lifespan and minimizing the need for replacements. | UNIVERSAL COMPATIBILITY: These versatile bits work flawlessly with both handheld drills and standard concrete core drills, fitting 1-1/4"-7 threaded mandrels for a wide range of applications. | CLEAN, PRECISE HOLES: Crafted to deliver smooth, debris-free holes in concrete, masonry, and stone, these core bits reduce cleanup time while providing professional-grade results. | ANTI-JAMMING DESIGN: Featuring water lubrication for cooler, frictionless operation, these drill bits help prevent overheating and jamming even in the toughest materials. | MULTI-SURFACE MASTERY: Ideal for both contractors and DIY enthusiasts, these core drill bits effortlessly tackle reinforced concrete, brick, and block, making them the perfect choice for plumbing, electrical, and construction projects.