Silver brazed drill bit, 14" L x 1.2" W, with 3 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 30mm or 1.2 inches. three segments. segment thickness is 3.8mm or .15 inches and segment height is 8.5mm or .33 inches. the connection screw is 5/8".