... bits,Tricone rock bit,Milled tooth bit,Roller Cone Bits ,matrix body PDC bits,steel body ...3.API Tricone Rotary Bits1 ... oil well drilling2,Model: various kinds and according to the requirements of customers3,Material: ally steel, tungsten carbide insert4,Color: can ... :1 piece7,Bit body Color: can be as you like: matrix body,pdc cutters8,Certification: API9,Applicable of: petroleum&gas,water ...