This heading is limited to desk-top or desktop-scale items — small units designed to sit on a work surface and organize papers or cards. Full-size, floor-standing filing cabinets are classified as metal furniture rather than here, because they function as freestanding furniture rather than desk accessories.

Yes — pen trays and similar desk items of base metal are explicitly named in the heading description. A metal pen holder or business-card stand that serves an organizational function on a desk surface fits squarely within this heading, provided it is not a decorative figurine or a product better described by another heading.