... and polycrystalline diamonds.Geotool can supply products as belows:Q Series AQ, BQ, NQ, HQ, PQT SeriesT36, T46, T56, ... 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) ... specific customers requirements. 3C (4-3/8" diameter) Diamond Reamer