This set containing the Aqua Trick marker and the water pen by Prym is handy for making temporary markings on clothing items and handicraft projects. Ideal for sewing, embroidery, quilting or patchwork. The marker has an extra fine tip that creates lines and marks that won't disappear on their own - this comes in very handy with large quilting patterns for example. All markings can be easily erased with the water pen. The water pen is filled with water and can be refilled as often as needed. The extra fine tip makes it possible to erase markings with precision. If you add stain remover to the water, it is even possible to remove small fabric stains. Further, the water pen is useful for temporary markings on fabrics. Make sure to remove all markings before ironing the fabric, otherwise the markings could become permanent. Always test the marker and water pen first on a sample piece of fabric.