Ideal for deep plumbing installations, this 102 mm (4 inch) extended core drill has a 100 mm usable length, perfect for creating passages for soil pipes through thick floor slabs, deep block walls, and multi-layered assemblies. It's built with a heavy-duty steel body and a vacuum-brazed diamond cutting edge for use with a high-power angle grinder. The M14 fitting and optimized segment design ensure fast material removal and effective cooling during dry operation. This makes it a great professional tool for the most demanding construction projects.