We are supplier of TCI tricone bits,steel tooth bits and pdc bits Material: Alloy steel Certificated by API&ISO9001 ... 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 . ... Model114,117,127,437,517,617,637 TypeTricone bits, Steel tooth bits, PDC bits Applicable water well, oil field, construction, ...