I bought a canvas painting online. Due to the fact that their shipping practices did not provide additional support, the beams spanning the canvas broke in many places, causing the painting to sag. Very sad. But I then hatched a plan to fix it using these supports. So it was only with the help of these coasters and my trusty screwdriver that I was able to save the painting on canvas from the rubble! It now hangs proudly on my wall, stretched and almost perfect, with a great story behind it of how I saved it. Not bad for a few bucks more.