The Clover Hera Marker makes slight creases on fabric that are your sewing guides. It can be used for marking and making creases simultaneously. It can also be used with carbon paper. It is a small hand tool with a sharp edge, and that is what allows you to make temporary crease marks on fabric. It can also be used to quickly press a seam allowance to one side. Uses no powder, but makes sharp, fine lines. Comes in a plastic sleeve; care and instructions are included in the package. Great for hand quilting or projects where you don't want any pen or chalk residue!