It is widely used in the processing of polygonal shapes on metal parts such as aerospace, aviation, automobiles, hardware and electronics, medical parts, transmission parts and so on. The pcm rotary knife handle can be used to make regular, irregular, sharp-edged, chamfered polygonal blind holes or through holes. In addition to the standard hexagon and square, the rotary punch can also be made into grooves, ellipses, rectangles, trapezoids, stars or other special patterns. Rotary cutting tool holder