The purpose of the tool design is to provide a process for producing high efficiency, high precision, low cost of production would be drills, reamers and chamfering tool composite together. The tool comprises a head and a shank in two parts, the head twist drills, reamers and the chamfered portion of the composite made of reamer teeth four tooth helical blade, handle straight handle, the whole structure is integral tool tool. Drilling part: The high-hole drill for drilling efficiency, the portion of the drilling tool remains traditional twist structure, the helix angle of the spiral groove portion of the holder body 300. Side of the blade should grind 0.02 - 0.04mm inverted cone to reduce friction, the edge portion of the chip can be processed smoothly guide the spiral groove discharged. The partially completed hole roughing step machined hole surface roughness and aperture are poor straightness, dimensional accuracy is not high, prepare for the subsequent reaming process.