... synthetic diamond utilizing a hard matrix compound on the face of the bit. The diamond set design ensures sufficient overlap ... to prevent premature wear of the matrix.1,Surface-Set diamond bits are primarily recommended ... limitations. Series Size AvailableQ series AQ, ,NQ, HQ, PQ (Front end & Back end Type)T SeriesT36, T46, T56, T66, T76, T86WF SeriesHWF, ...