You are purchasing the Sewline Aqua Eraser only. Getting those drafting lines from fabric has sometimes been a cause of concern when we wanted to get rid of the lines without hurting our fabric. Not any more with the new Sewline Aqua Eraser. It works rather like a fountain pen with a reservoir you simply fill with water or a water and detergent mix.
Your finger pressure on the soft grip then dampens the special soft fibre point. By lightly dabbing or running this point along the line or mark, the special point absorbs the pencil or water-based ink mark. So much quicker and easier than fiddling with a sponge or cloth. When the point of the Aqua Eraser becomes discoloured, simply pull it out and slip in a new point. Nib refills are available.