The Shelly Ruler Template is Creative Grids machine quilting tool used for quilting clamshells, orange peels, flowers, arcs, echos, and leaves. The specially designed stops of the Shelly Quilting Ruler allow you to create perfect clamshells from both the left and right side of the ruler. This must-have ruler is used for free motion quilting on both home machines and longarm quilting machines! Designed by Angela Walters, the Shelly Machine Quilting Tool features Creative Grids exclusive grip which prevents it from moving on fabric as you quilt. The black and white dashed guidelines are easy to see whether you are quilting on dark or light fabrics. Creative Grids rulers are made in the USA from 1/4-inch thick, high-quality acrylic.