You can firmly fasten recipe cards and sticker mounts! Introducing the "Magnet Clip" found in Nitori.
A clip with a magnet that can be used by attaching it to a refrigerator door or whiteboard. It is shaped like a clothespin and snaps into note papers and leaflets. If you use two or more clips, it is convenient to hold a large piece of paper in a stable manner. Note that it may be affected by magnets, so be careful not to bring it close to magnetic products, magnetic cards, precision equipment, etc.
The price is 205 yen (tax included) for a set of five. If you are worried that the notes on the refrigerator that are fastened with magnets tend to slip off, why not use it?