The round circular waste file can be turned into a drawing tool for working with metal. For crafts, you need the file itself and a piece of steel bar or hexagon.
Thanks to the grade of steel used, a file sharpened on one side leaves a mark if you hold it on a sheet of metal. It should be sharpened so that it resembles a pencil in shape.
A piece of hexagon is welded to the solid part of the future scriber to increase the length, for ease of use.