... Grade Diamond Drill Bit in 1-1/4"UNC Connection and 450mm Working LengthFor wet cutting very ... materials, such as reinforced concrete, brick/block and general building materials. Our Diamond Core Drill Bit ... 2"BSP, 1-1/4"UNC, 5/8", PIXIE, M16, M22, M27 and ect....Available all kinds ... customers' requests.Segments could be welded by laser and braze. Products DetailsSize & Specifications for reference. Ø- ...