laser welded diamond core drill bit designed for tiles and stones. laser welding makes the product safe to use on handheld drills and our professional bond designs makes it easy to drill through various materials with long lasting tool life. different thread or non-thread adaptors are available upon request. recommended for wet drilling. DIAMETERSEG. DIMENSIONSTube LengthThreadINCHMMTHICKHEIGHTLM125.53.0mm10mm2(50mm)5/8-11UNC1-1/828.63.0mm10mm2(50mm)5/8-11UNC1-1/432.03.0mm10mm2(50mm)5/8-11UNC1-3/835.03.0mm10mm2(50mm)5/8-11UNC1-1/238.13.0mm10mm2(50mm)5/8-11UNC1-3/444.53.0mm10mm2(50mm)5/8-11UNC251.53.0mm10mm2(50mm)5/8-11UNC2-1/457.23.0mm10mm2(50mm)5/8-11UNC2-1/264.03.0mm10mm2(50mm)5/8-11UNC376.33.0mm10mm2(50mm)5/8-11UNC