1 fast drilling speed, 2 high efficiency and less chipping, 3 minimum material deformation 4 long ... Feature:Sharp,wear-resistingNo jumping edgeLong service liferequire lower WOB,high rotary speed and small flow rate, good concentricityWildly used in ... . Cone shank3. Threaded shankSegment Height: 10mmWall Thickness: 0.8mm-1mm diamond core bits