T6 series Impregnated Diamond Core Drill Bits for hard rockThe ... rate is maintained as a result of this action. C6,C9,C12 series.Our impregnated bits are manufactured to give ... T2 66, T2 76, T2 86, T2 101 T6 series: T6 76, T6 86, T6 101, T6 116, T6 131T series: T36, T46, T56, T66, T76 ... line,T2-101,T2-101Core lineT6 SeriesT6-76, T6-86,T6-101, T6-116, T6-131,T6-146B Series (ISO3552-1)B36, B46, B56, ...