... polycrystalline diamonds.Geotool can supply products as belows:Q Series AQ, BQ, NQ, HQ, PQT SeriesT36, T46, T56, T66, T76, T86, TEW ... , TBW, TNWWF SeriesHWF, PWF, SWF, UWF, ZWF WT Series RWT, EWT ... , AWT, BWT, NWT, HWT (Single Tube/Double Tube) WG Series: EWG, AWG, BWG, NWG, HWG (Single Tube/Double Tube) WM ...