... penetration high percentage core recovery in soft to hard rock formatio PDC core bits for oil ... life,very fast penetration and high percentage core recovery in soft to hard rock formations. ... drilling in non-consolidated and medium hard rock formation. Series Size AvailableQ seriesAQ, BQ, BQ3, NQ, NQ2, ... UWF, ZWFWG seriesEWG, AWG, BWG, NWG, HWG WM series EWM, AWM, BWM Others NMLC, HMLC, LTK48, LTK60 ...