I never thought the large 24" square (or whatever size it is?) would be of any use. I won it from going on a Shop Hop.
Best.Thing.Ever.
There are so many times I grab it for squaring things up, that now I wonder how I did anything without it.
Get to know how to use your 45, 60, and other angles on the rulers. A lot of time they seem to go unnoticed and they can be so useful!