Clover Fabric Folding Pen CLO4054 What does it do? - The applications are endless and make fabric manipulation quick, easy and precise. The Fabric Folding Pen is a natural for appliqué or reverse appliqué. You can either trace or freehand any line that forms your design. These "relaxed" fibers will allow you to easily manipulate your fabric around that line. English Paper Piecing can now be done without all of the stitches. Wow, what a time saver. Let's you form all of your shapes quickly and easily and get on to the fun part of creating your finished product.