Ideal for deep plumbing and electrical installations, this 25 mm core drill with a 100 mm usable length is perfect for drilling through thick countertops, deep walls, and exterior-insulated walls. It creates a clean, continuous hole from a single side, saving time and ensuring accuracy. It features a durable body and a vacuum-brazed diamond cutting edge designed for high-speed dry drilling. The M14 thread allows for direct attachment to an angle grinder, while the extended barrel helps manage heat and debris. This makes it an ideal tool for specialized, high-value installations where standard bits can't reach.