GREAT PDC bits/ PDC bits 1) Be used for water well, oil field, underground, construction, geothermal, directional boring 2) Various of model and dimension available 3) High quality and competitive price 4) Improved support and retention, diamond are impregnated in the matrix behind the PDC cutters 5) Cangzhou Great Drill Co., Ltd specializes in drill bits, tricone bits, PDC bits bit size range from 3 7/8"to 26", cover most of IADC codes.