I don't think it's the best title, but I don't know what else to use.
I have several of these large tiles, and I want to make a planter out of them. Is there a bracket (like the image below) that I can put in each corner that will hold these five tiles together so that they stay together?
If not, how can I attach five tiles so that they stay together and remain together?
It will be used as a planter. The brackets could be on the inside or the outside.