The punch [or plug] cutter is a modern day favorite of cigar lovers.  The cylindrical blade provides a precise and consistent cut.   When using a punch cutter, it is important to put one hand on the head and over the shoulders of the cigar and apply a firm grip.  This will keep the cap from shifting or loosening.  The cutter and/or cigar should be slightly twisted as the wrapper is pierced to avoid tearing.  Punch cutters are available in varying diameters  and in a multitude of styles: from keychains to self cleaning.  The greatest asset of the punch cutter, barring user error, is that it is always consistent.