... of the tooth row 17 1/2" tricone button bit 12 tci bits iadc 343.Cutting Structure1.The durability of premium tungsten ... core bit,PDC bits,reamer bit,drill pipe&rod,steel pipe,pdc drill bit,hole opener,milled tooth tricone bit,TCI rock roller tricone ... bit,PDC Drill Bit,oil drill bit,used drill pipe Number of Employees:50-100 People 17 1/2" tricone button ...