The basics The Dritz Serrated Tracing Wheel is used for marking multiple layers and bulky fabrics. The pro tip Work on hard protected surface and mark wrong side of fabric only. The uses Use with tracing paper to transfer pattern markings for darts, pleats, tucks, pockets, and buttonholes to fabric. The bottom line Will transfer markings through a double thickness of most fabrics. Makes dotted markings on most fabric.