Lackmond PRM Series Dry Masonry Drill Bit - 1-3/4" Stone/Masonry Hole Saw with Diamond Segments for Fast Drilling & 5/8"-11 Thread Arbor - DCB134PRM VERSATILITY ON THE JOB  The PRM series is ideal for making pass-through penetrations in brick, block, stone and other masonry applications SEGMENTED TURBO CONFIGURATION  PRM series core drill bits are engineered with a solid thin wall tube with widely spaced turbo style diamond segments that allow for fast drilling and heat dissipation BUILT FOR THE PROFESSIONAL  This is the ideal hole saw for construction workers, carpenters, contractors, serious DIYers, and tradesmen. The ultimate tool for professional, precise and smooth cuts EQUIPMENT  Designed to be used with a core drill rig; Rotary drill; Hand grinder DRY SAW BLADE  Use dry only