Several listings report hanging-rail or adjustable-rod drawers designed for A4 and letter files; some models also explicitly support legal-size documents.
Materials vary by model and include wood or wood-frame constructions, engineered wood/MDF, steel frames, and particleboard surfaces.
In this set of listings drawer counts range from about 2 up to 6 drawers, with 2- and 5-drawer models common and at least one 6-drawer organizer noted.
Many models include built-in wheels or swivel casters for easy movement; several also list lockable or locking casters so the unit can be secured once positioned.
Slim, vertical designs, compact heights, and narrow footprints are highlighted in several listings—features that let units slide under desks and reduce floor-space usage.
