I purchased tile mates for my kids, nieces and nephews for Christmas, and within a week of being used, one of them broke off my daughter's key chain. They are not durable products. Even worse, per the Tile company "physical damage isn't covered by warranty." No replacement for a product that has been used for a week and broke doing it's primary function - hanging off a key chain. But they did offer me a discount on a new one - how nice. Avoid this product! Per Tile: Our Tiles were built to last and are made of materials that are both light and durable. That said, there may come a time when you find that your Tile has suffered damage that renders it nonfunctional. Unfortunately, physical damage is not covered by the warranty. In this particular situation I can offer a 20% discount towards another Tile purchase. I'm sorry that this has happened, though I do appreciate your understanding.