Precision composite tools directly affect the quality of the machined hole (geometrical accuracy and surface roughness). To maximize the effectiveness of complex tool, it is necessary to ensure the accuracy of the tool itself, the tool itself and therefore must develop practical processes. According to the tool body to obtain good mechanical properties (strength and high toughness sufficient matching) to ensure stable cutter body size, in general process is: Roughing tool body knife body is quenched and a finishing tool a milling body Flute part of a milling reamer cutting portion a quenching and tempering (hardness 62 -66HRC) outer diameter of a grinding drill reamer sharpening a sharpening a cutting edge 45. Chamfered edge sharpening knife handle everything except a false top, hand-grinding 1180 front angle.