The protractor ruler allows the quilter to cut any equal sided shape and any size wedge. With the OmniAngle protactor ruler, you can create Millefiori shapes, isosceles triangles, circular quilt and crafting designs.Details:Clear4" x 24"Unique numbering and angle systemUsed with left- and right-handersVisible on both dark and light color fabricsFor use with quilting, sewing, and crafting projectsFor use with rotary cutter or straight edge blades