Diamond Products Wet Diamond Core Bit 10055 3 1 2 Inch Star Blue (13 Inch Depth 5 8 Inch Hub Thread Concrete Drilling) Trowel Machines this two cutter decorative bit maintains this two cutter decorative bit maintains sharp edge retention and chatter free balance across custom cabinetry and fine furniture millwork 35 mm) Abrasive Bond Material Cobalt Matrix Reinforced with Tungsten Carbide Dust Management Vents 5 Hole Cooling & Airflow Extraction Configuration Target Substrates Cured Concrete no walk starting geometry on reinforced surfaces Extended Core Length: 13 inch usable drilling depth permits deep penetration through thick commercial walls and foundational slabs in a single pass