The Extension Wedge 5/7 is made from a clear durable material.  It is designed to be used in conjunction with the Sewing Revolution 5/7 and butts up to and slides around the edge, extending the design area up to 40 inches in diameter. Perfect for larger projects such as table linen or quilt centers. Placement of 10, 14, or 20 designs in a circle. Able to mark two embroidery or appliqué placements at once. Accurately draw large pentagons or heptagons. Draw large 5 or 7 point stars for quilting designs or appliqué. Comes with a detailed instruction sheet