... diamond are distributed in the depth of impregnated bit's matrix series.The matrix layer of the crown contains a uniform ... Our impregnated bits are manufactured to give optimum penetration 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 ...