Steel tooth tricone bit 1)certified by ISO9001&API 2))used for water ... 3)IADC:114,117,127,437,517,617,637 Steel tooth tricone bit 1.Sizes range from 3 7/8" to 26 ... all IADC codes . 3. Steel tooth bits is always rubber O-ring sealed bearing or roller non-sealed bearing.4.Used for ... Model 114-117,127,437,517,617,637 TypeTricone bits,Steel tooth bits,PDC bits Appliable water well, oil field, construction, ...