The most important advantages at a glance: paper holds up to 500 sheets of paper as in a folder thanks to the infinitely lockable cover strip. Double perforation for hanging the document in the middle or flush with the folder edge, the folder no longer falls around bendable perforated edge (desired breaking point) for filing or shipping in the envelope. Copying individual pages possible without removing the sheet. To have to have to ffFor use in hanging folders, indelible (contains no plasticisers)