Diamond core drill bit. Laser-welded or silver-brazed. CB with TURBO segments. Offer more aggressive drilling and excellent dust removal. Application: reinforced concrete. masonry. brick, cured concrete, asphalt and other abrasive materials. Threaded connection: R12", UNC1-14", 58"-11. Barrel depthEffective length: 12"305 mm, 14"357 mm. 16"406 mm. Segment height: 7 mm. 9 mm, 10 mm available.