Heavy-Duty Wet Coring –2-3/4-inch (≈ 70mm) diameter core bit designed for drilling through hard concrete, reinforced concrete, brick, block and other tough masonry. Standard Thread & Wide Compatibility – 1-1/4″-7 threaded arbor ensures stable connection; fits most standard core drilling rigs and water-cooled systems. Durable Diamond Segment Construction – 10 mm segment height with premium diamond-embedded cutting edge for extended life and efficient coring. Long Reach & Deep Drilling – 15.7″ overall length (works well for deep holes) — ideal for installations like HVAC piping, ductwork, plumbing, stair railings, and structural penetrations. Wet-Only Core Bit for Cleaner, Safer Drilling – Designed for wet drilling to reduce dust, prolong bit life, and maintain cutting performance — recommended for construction, renovation, or demolition projects. The NINEROARS 2.75" Wet Diamond Core Drill Bit is built for serious concrete and masonry work. Whether you’re working on reinforced concrete walls, blocks, bricks or other hard masonry, this core bit delivers reliable performance and durability. With a 2-3/4-inch diameter and a robust diamond-embedded cutting edge (10 mm segment height), it powers through demanding materials with stability and precision. Thanks to the standard 1-1/4″-7 threaded arbor, the drill bit easily mounts on most core drilling rigs and water-cooled systems, providing a secure fit and smooth operation. The 15.7″ overall length makes it suitable for deep drilling jobs, whether you’re installing HVAC systems, plumbing, structural supports, or performing renovation work. This is a wet-use core bit — using water cooling reduces dust, helps maintain cutting performance, and extends tool life. For best results, use with an appropriate wet-core drill rig. Each bit is engineered for heavy-duty, professional-grade work, making it ideal for contractors, builders, and serious DIYers alike.