Ideal for creating large, precise openings in tough materials, the 126 mm Diamond Core Drill is designed for wet drilling with a drill rig. It cuts quickly and cleanly through heavily reinforced concrete, dense refractory, and other challenging substrates. The drill features laser-welded diamond segments for durability and an aggressive cut. Its robust steel barrel resists distortion for perfectly round holes. The drill's 1 1/4" UNC female backend provides a secure, universal connection to professional rig-mounted core drill motors.