... 4- All model & dimension available 5-High speed Steel tooth Tricone drill bit Hejian Fist Petroleum Equipment Co., Ltd. We have been ... formations(213,214,215,217)These bits are designed to drill formations such as hard sandstone, dolomite, and broken formations ... GA625GY7 5/8 more information: Model6-26( inch) TypeTricone bits, Steel tooth bits, PDC bits Applicable water well, oil field, construction ...