... and long life 3, Full range of sizes Diamond core drill bits with brazed segments for concrete wet use1, Suitable in Asia, Russia, Middle east ... 10mm to 800mm.5, Available effective working length 380mm, 400mm, 450mm, 500mm, extra long up to 1500mm.6, Available wall thickness ... and pallet.9, Other sizes can be provided upon request. Diamond core drill bits for concrete wet use