A lever arch file is a type of binder used for organizing and storing documents. It features a metal lever mechanism that allows users to easily open and close the file, making it simple to add or remove sheets of paper. Typically made from cardboard or plastic, these files can hold a significant number of pages, often up to 500 sheets, depending on the size. These files are commonly used in offices, schools, and homes for keeping important papers, reports, and presentations organized. They come in various sizes and colors, allowing for easy categorization and identification of contents.