... diamond core bit has excellent ability in drilling concrete, reinforced concrete and brick wall. Thinner diamond segment and thinner ... Array Method, better quality than Arix product, but cheaper!More SharpnessAkyd Core drill has 30% sharper than the common ... , Euro and Mid-East etc.Application: Granite, Asphalt Marble, Reinforced Concrete, Concrete, Brick, Block, Stone and other Abrasive Materials. ...