... or metal seal8> including drill rods,drill collar,rerun steel tooth bits, ,used drill bits stock,used mud pumps,etc9> be used for water well, oil ... bit body, the bit has good gauge protection and up drill capability3> Bearing StructureHigh precision journal bearing, Ball lock the cone ... .2517, 527, 537, 6176152.4517 TCI tricone bit rock bit drill bit steel tooth bit