Vault space is always a premium. With limited shelf space, try using this vault drawer which mounts to the underside of any shelf. It provides 2 in H x 11.5 in W x 12 in D worth of previously unused space. Perfect for a variety of loose valuables and documents. The wire form frame slides over any shelf up to 1 in THK. The frame's retaining bar butts up against the tray's molded lip to keep the user from pulling the drawer out too far and spilling its contents.