... diamond are distributed in the depth of impregnated bit's matrix series.The matrix layer of the crown contains a uniform ... rates and bit life, which is required to keep the cost of diamond drilling to a minimum.Size Available:Q Series: A ... ,B,N,H,P/ATK,BTK,B3,N2,N3,NTT,H3,HTT,P3,PTTT2 Series: T2 46 ... T2 56,T2 66,T2 76,T2 86,T2 101T6 Series: T6 76,T6 86,T6 101,T6 116,T6 ...