We send out over 500 Newsletters every month, and it can be a very stressful time. We had been closing the newsletters using tape..., stickers, etc., but had parents complaining that their newsletters would rip when they attempted to open them. I had no idea this sort of product even existed, but happened upon them while desparately trying to find something that might eliminate the ripping problem. These are PERFECTION! So simple to use, and it actually made our newsletters look much more professional! I highly recommend these for all your mail closure needs, especially if you send out brochures or tri-fold newsletters!