Easily makes Circles simply divide 360 degrees by the size of the wedge to determine how many pieces of fabric you'll need. Or, divide 360 degrees by the number of fabrics you want to use, and that will determine the size of the wedge you need. Unbreakable under normal usage. Wedge is clear to insure clarity and accuracy. Includes a pattern to be used with the wedge to locate the center point of the circle.