... rock bits,kingdream bit,smith bit,tricone bits, diamond bits,PDC bits,TCI tricone bits, steel tooth bits, milled tooth bits, TCI rock bits, oilfield bits ... (polycrystalline diamond compact) grades and shapes applied for rock formations as follows:1. Andesite, marble, metamorphic ... ,117,127,437,517,617,637 TypeTricone bits, Steel tooth bits, PDC bits Applicable water well, oil field, construction, ...