Just needed a clip for my daily planner and wanted something that wasn't a paper clip but was flatter than an office clip.  These fit the bill perfectly.  Also with the different colored background you can see that when looking at the edge of the book which helps me with organization.  They aren't real strong magnets and will only clip 2-3 pages together but they're supposed to just be used to mark you place, not clip things together.  They work perfectly as bookmarks.