The Bosch Universal Diamond Dry Core Cutter in 117mm is designed for heavy-duty penetration work, particularly where large-diameter service entries, soil stacks, or ventilation ducting need to pass through masonry walls. The 117mm size provides ample clearance for substantial pipework and ducting systems. Laser-welded diamond segments deliver consistent, reliable performance through dry masonry drilling in limestone, brick, and masonry, maintaining cutting efficiency over repeated use. No water is required, which is a significant advantage when working in areas where moisture could cause damage or disruption. It fits ½-inch threaded diamond drills, making integration into your existing tool setup simple and fast. Features and Benefits: • Laser-welded diamond segments for durable, high-performance cutting • Dry masonry drilling — no water cooling needed • Suitable for limestone, brick, and masonry • Ideal for large service entries, soil stacks, and ventilation ducting • Fits ½-inch threaded diamond drills