... , Fast, smooth drilling and long life 3, Full range of sizes Diamond triple core drill bits with brazed segments for concrete wet ... 800mm.5, Available effective working length 380mm, 400mm, 450mm, 500mm, extra long up to 1500mm.6, Available wall thickness: 1.5mm, 2mm ... in 1-1/4"UNC, 1/2"BSP,5/8"-11, M14, M16, M42, CRI28 or PIXIE, etc.8, Full inspection ...