... etc. Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit, casing shoe bit, corelifter, corelifter case, core ... matrix compound on the face of the bit. The diamond set design ensures sufficient overlap to prevent premature ... (); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Surface set diamond core bit NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC ...