Self-piercing grommets eliminate extra steps and save time, which saves you money!  How?  The tips of the barrels on each grommet are sharper and the material is more rigid, which allows the grommets to cut their own perfect sized holes every time.  This eliminates the need to 'pre-cut' holes, saves labor hours and provides the framework for a quality grommet setting with every insertion.  Having the grommets cut their own holes also eliminates the extra cost of purchasing and maintaining a separate hole-punch and allows significant savings.