What are the rails inside a filing cabinet drawer for?

The parallel metal rails running along the sides of a filing drawer are suspension rails (also called hanging file rails or hanging folder rails). Hanging file folders have small metal hooks on their top edges that rest on these rails, keeping folders suspended upright and easy to flip through from above. Without suspension rails, you'd be stacking folders flat and searching through them from the top — much less efficient. Confirm that any cabinet you're considering includes suspension rails before purchase. FindOfficeFurniture.com — call 888-719-4960.