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