TCI tricone bit, steel teeth tricone bit,rock bit.certified by ISO and API.cover wide size code best pricedelivery on time We are a professional company in supplying tricone bits,steel teeth bits,single cone bits,and PDC bits. Bits sizes range from 3 7/8” to 26”.and cover almost all IADC codes.It can be used in various of different fields,mining,hydrology,subterranean heatpilling,water well ...