... Diamond triple core drill bits with brazed segments for concrete wet use1, Diamond triple core bits are ... customers can change any of them to reduce cost2, For drilling concrete, reinforced concrete , concrete products ,masonry walls3 ... , 400mm, 450mm, 500mm, extra long up to 1500mm.6, Available wall thickness: 1.5mm, 2mm, 2.5mm, ... upon request. Diamond core drill bits for concrete triple 3 sections