I use my MISTI precision stamper all the time with my poly and cling rubber stamps. These magnets work perfectly with the magnetic base of the MISTI making it possible to give extra stabilization to my card project while I stamp. My cards are used in my Women's Bible Study, and also in my prayer team work. So several of my designs are the same. These magnets allow my to be able to place my card on my MISTI and they hold the card firmly in place while stamp. If I need to re-stamp my image, I can to do so confidently because the magnets are not going to move -- my card will stay put in the exact spot. I can not work without these magnets. However, because they are so brittle, and I use them so much, I do occasionally have to replace them, at a reasonable price for a great product. Open the package with care. I suggest one magnet at a time and do not lay them next to each other as they jump towards each other.