core drill bit,strongest segment core bit available electroplate side body protection dia 3/8",9/16", ... -1/4",1-1/2",2" Professional diamond core drill bit,Diamond Core BitsHigh quality core bits for drilling granitecut through ... 5/8"-11,M14both wet and dry usewe provide Drill bit,Router bit,Finger bit,Grinding wheel,Router wheel,Profiling wheel etc.