U Brands Magnetic Card Holders - 2" x 1" Black Business Card Holders (25 Pack) - Perfect for Office, Retail Displays & Trade Show Promotions

These things work great. The magnet is strong enough to stick without slipping or falling off and the card holders come with a clear plastic protector that goes over the paper to keep it from being damaged. The only problem I had was that they were smaller than I was expecting, which was a me problem. I didn't see the period before the number 5 in the description, so I thought it was 6 inches by 5 inches, not 6 inches by a half inch.Not a big deal. It just means I can't use the items for my original purpose. I wanted to put one on the fridge where we could exchange notes or put important messages on it, but that isn't possible unless the note if very small now. As for other uses, it works great for filing cabinets and small notes. We are using it for our new refrigerator, which has doors that tend to not close all the way on their own, reminding us to close them manually (our old one closed on its own so we got used to just letting the door swing shut). We can also use them for notes on other metal appliances such as reminding us to turn the gas burners off when done cooking, which has happened a few times by mistake.