These lever arch mechanisms consist of arched sturdy metal elements (normally two) on a back plate and having at least one opening trigger that permits inserting and filing of sheets and other documents.
Kangmehhanismid koosnevad alusplaadile kinnitatud tugevatest metallelementidest (tavaliselt kahest) ja vähemalt ühest avamispäästikust, mille abil saab lisada ja arhiveerida pabereid ja muid dokumente.