... ironstone, chert, abrasive rock etc. Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit, casing shoe ... quality control. Reaming shell is set with natural or synthetic diamond, and it is used to couple the drill bit ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Diamond reaming shell NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC ...