PROFESSIONAL QUALITY 107MM x 150MM DIAMOND CORE DRILL HIGH DIAMOND CONCENTRATION Full 150mm cutting depth spans the cavity to ensure that holes in the inner and outer leaves of the cavity wall line up This allows complete hole to be drilled from one side in most instances A diamond cutter will cut a cleaner hole than tungsten tipped cutters Segmented design outstanding cutting performance consistent cutting depth long cutting life high quality diamond concentration Includes hex 200mm long arbor , pilot drill & ejector drift .