Add this extension to the Phillips Fiber Arts Ten Degree Wedge Tool to make a square from a circle. The square is 54" X 54". Use the template connector to attach it to your Ten Degree Tool. Works with the Two Piece Ten Degree Tool as well. This product DOES NOT work with the new Creative Grids Ten Degree Ruler. THIS IS THE ONLY ONE IN OUR STOCK, AND WE DO NOT HAVE THE REGULAR 10 DEGREE RULERS