Clamps: The tray includes two sturdy clips that fit desks up to 4.5 cm thick without damaging the table surface. Foldable: A 90‑degree folding design allows the tray to be stored easily when not in use, saving space. Design: No perforations are needed, and rounded corners prevent accidental bumps while keeping the desktop tidy. Space: Expands available desktop area by 80x20 cm, reducing clutter and improving workspace organization. Compatibility: Suitable only for square‑edged desks; requires at least 5 cm of clear edge space for clamping. The clamp-on keyboard tray features stable bearing capacity that can support up to 5kg of keyboards, mice and other desktop small accessories during daily use.