Quartet Improv Lobby Clip Frame Sign, 18 x 24 Inches, Aluminum Frame (CF2418) Depend on the quality, professional sign in lobbies, small restaurants or on-the-go trade shows. Elevate standard-size papers and posters to attractive signage. Display the flexible, lightweight frame on table-tops or walls. Set up a mobile table-top display with 2 metal posts that screw easily into the back of the frame. Unhinge the frame edges with one easy flip to quickly change sign display.