This "Binder in a Box" keeps records neat and dust free. Rugged plastic posts and compression rings lock closed for the ultimate in document security. Posts adjust to 2 3/4" or 4 1/4" spacing to suit a variety of materials. Unique snap fastener closure ensures binder opens easily yet locks securely. Box Type: Storage; Material(s): Corrugated Fiberboard; Strength: Basic; File Size Format: Letter.