... soft to hard rock formatio PDC core bits for oil explorationAslo we could supply the bits for mining.1,Polycrystalline diamond cutters are set ... to T.C. Bits and Surface set diamond bits, when drilling in non-consolidated and medium hard rock formation. Series Size AvailableQ seriesAQ, ... , SWF, UWF, ZWFWG seriesEWG, AWG, BWG, NWG, HWG WM series EWM, AWM, BWM Others NMLC, HMLC, LTK48, LTK60 Other sizes ...