T2 series Impregnated Diamond Core Drill Bits for hard ... rate is maintained as a result of this action. C6,C9,C12 series.Our impregnated bits are manufactured to give ... , NQ3, NQTT, HQ3, HQTT, PQ3, PQTT T2 series: T2 46, T2 56, T2 66, T2 76, T2 86, T2 101 T6 series: T6 76, T6 86 ... TT, T2&TB SeriesT36, TT46, T2-46, TB56, TT56, T2-56, T2-66, T2-76, T2-76 Core line, T2-86, T2-86 Core line,T2-101,T2-101Core ...