... 3, Full range of sizes Diamond triple core drill bits with brazed segments for concrete wet use1, Diamond triple core bits are combined by three removable parts ... and long life;4, Available diameters from 10mm to 800mm.5, Available effective working length 380mm, 400mm, 450mm, 500mm, extra long ... 1-1/4"UNC, 1/2"BSP,5/8"-11, M14, M16, M42, CRI28 or PIXIE, etc.8, Full inspection of the adaptor size ...