Long auger drill materials used for job performance level has played a decisive role in

Now a considerable number of the alloy material, but not a professional who does not know what kind of good or bad, just by manufacturers only after the introduction  abrasive grinding  good or bad, long auger drill materials used for job performance levels played a decisive role, then what kind of material is good? PDC as a new high-strength  synthetic diamond  materials, grinding, its history only ten years, but its application has been developed to all walks of life, widely used in geological drilling,  Diamond blade  metals and alloys, tungsten carbide, graphite, plastics, rubber, ceramics and wood and other materials, machining and other fields.