As a teacher I use them on a daily basis in the classroom.I was looking for something strong enough to use for many different tasks. These clips have been very helpful. They are super for using on the whiteboard. They are also great for hanging posters displaying signs holding charts etc. They are very strong and have always been reliable. The clips are also very nice looking and are of good quality. I highly recommend these magnetic clips for everyone. Trust me you will love them as much as I do.