... distributed in the depth of impregnated bit's matrix series. The matrix layer of the ZM contains a ... as a result of this action. C6,C9,C12 series.Our impregnated bits are manufactured to give optimum penetration ... NQ2,NQ3,HQ, HQ2,HQ3,PQ,PQ2,PQ3T, TT, T2&TB SeriesT36, TT46, T2-46, TB56, TT56, T2-56, ... AWT, BWT, NWT, HWT (Single Tube/Double Tube)WG Series:EWG, AWG, BWG, NWG, HWG (Single Tube/Double Tube ...