... Description about sell rock bits,tricone bits, diamond bits,PDC bits,TCI bits, steel tooth bits, milled tooth bits, rock bits, oilfield bits and so on .Specification ... For very hard and high abrasive formations)Being widely used in the field of mine, transportation, tunnel and ... Model114,117,127,437,517,617,637 TypeTricone bits, Steel tooth bits, PDC bits Applicable water well, oil field, construction, ...