These are great if you want to stick something on the fridge or other magnetic surface. They're small enough not to get in the way and hold a variety of papers well. However, I bought them specifically for use on a dry erase glass board and they will NOT work on it. It doesn't even seem a little. So they really shouldn't be promoted as something suitable for this purpose. I am sending these back. If anyone has a clue as to where the magnets actually work with Quartet's glass board, I'm all ears (well, eyes actually.) :)