I'm so happy with how this turned out. I was doing a round for a medallion quilt in our guild and decided to use this new ruler I had bought. I first saw it in my gmail advertisements. I visited the website and decided to give it a try. I think it looks cool!
It's called a Double Diamond Ruler. In the package you get 2 rulers for doing 4.5" and 2.5" borders. You can see them at Bright-Quilting-Notions.com.