mobile file cart with locking lid

Most mobile file carts support common folder sizes such as Letter, A4, Legal and F4. Many models use adjustable hanging rails or rods so you can switch between sizes or accommodate mixed folders without modifying the drawer.

Common locking systems include central key locks that secure multiple drawers at once, multi‑stage or full‑lock mechanisms that engage several lock points, and designs with dedicated lock points for specific bays or drawers to control access.

Beyond keyed locks, some carts include additional lock points for doors and individual drawers for finer access control; privacy features such as faux‑leather straps or covers that conceal folder tops; and stability features like wheel brakes or locking casters that keep the unit from moving when parked.

Many models include safety interlock systems that lock all other drawers when one is open (allowing only one drawer to open at a time) and anti‑tilt designs to reduce tipping risk. Some listings also mention a center caster or similar stabilizing element to help prevent forward tipping when a drawer is extended.

Product descriptions commonly list swivel/360° casters (often four), frequently with two lockable wheels. Some units use five casters or add a center caster for extra stability, and workbench‑style carts may specify casters with brakes and swivel locks for secure placement.

Both options appear in product details: some carts ship fully assembled and ready to use, while others require adult assembly (many listings note that tools are provided). Descriptions typically state either “No Assembly Required” or “Adult Assembly Required, Tools Provided.”