A foldable, portable, magnetic tool mat. The stored deleted property information may relate to one or more different properties that are associated with the deletion of the item, such as: a time when the item was deleted, a device from which item was deleted, a device on which the item was stored when deleted, a location of a user where the item was deleted, an application associated with the item, and the like. The dummy substrate is returned to the dummy substrate storage means after dry cleaning is completed. The protrusions are arranged in a plurality of rows, each row occupying one course.