Ideal for creating 12-inch diameter holes for large pipes, manholes, and major service installations, the 300 mm Diamond Core Drill is designed for wet drilling with a drill rig. It cuts quickly and accurately through heavily reinforced concrete and other dense materials. The drill features laser-welded diamond segments for durability and an aggressive, long-lasting cut. Its 1 1/4" UNC female backend is the industry standard, ensuring a secure fit on professional rig-mounted core drilling motors.