Use with tracing paper to transfer pattern markings for darts, pleats, tucks, pockets and buttonholes to fabric. *Product cannot to be sold on any 3rd Party site such as Amazon, Etsy, Ebay or any other 3rd Party sites, unless approved by the manufacturer.* Will transfer markings through a double thickness of most fabrics. To mark lightweight, pile or delicate fabrics, you may prefer to use the Smooth Tracing Wheel.