Silver brazed drill bit, 14" l x 4" w, with 10 segments. mainly used for drilling reinforced concrete, it also can be used for general purpose drilling. length is 350mm or 14 inches and thickness is 102mm or 4 inches. segment thickness is 4mm or .16 inches and segment height is 8.5mm or .33 inches. the connection screw is 1-1/4".