Darice Sticky Back Magnet Card - Black - 2 x 3.5 inches - 10 Pieces

Product was substandard, the magnet was not strong enough to hold anything up. Useless.

I've been taking these bad boys and gluing them onto the back of letter openers so I could slap them onto the fridge for easy access. One layer wasn't enough (the divot in the letter opener where I put the magnet was deeper than the thickness of the magnet) but I could glue two magnets back to back, which probably also made the magnet a bit stronger as a result. I threw the remainder magnets in my junk drawer, I'll be looking for more things to bind together by magnetic bond.