Drill smoothly and accurately through reinforced concrete, standard concrete, and hard stone with the Carat Brilliant eb diamond core bit. Thanks to its specialized tt segments, you achieve a fast start and high cutting efficiency when creating large openings for ventilation ducts and service lines. The laser-welded segments deliver dependable strength during demanding wet drilling tasks with water cooling. Featuring a 181 mm diameter, a 420 mm working length, and a standard 5/4" unc connection, this core bit transfers the full drilling power of your rig-mounted core drill.