Structure adopted as an integral tool, so need to choose the right tool material according to the nature of processing materials, production characteristics, cutting characteristics. The main part of the drilling completed roughing, the depth of cut is large, the larger the tool to bear the cutting force, cutting speed is low, and therefore should use high strength, impact resistance and vibration resistance and good wear resistance of the tool material; reaming part is completed finishing, dimensional stability is part of cutting edge at relatively higher drilling, depth of cut is small, and therefore should use better wear resistance and heat resistance of the tool material.

     For these reasons, the handle of the tool cutting portion material are used W18Cr4V high-speed steel. The material is a high hardness, high wear resistance and high heat resistance of the tool steel. Its good process performance, strength and good toughness, mainly used to manufacture complex thin bladed and impact resistance of metal cutting tools, high temperature bearings can also be manufactured and cold extrusion mold.