Surface-set diamond core bit NQ, HQ, PQ, NQ2, HQ3, PQ3 T2, ... detailed specifications or catalog. Surface-set diamond core bit & Casing bits & Casing shoe bits Surface-set diamond reaming shell NQ & HQ impregnated diamond core bit 6mm & 12mm Drill ... .minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Surface set diamond core bit NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC