Standard Swinger Changing Message Sidewalk Sign and Letter Kit&nbsp; - By SmartSign Includes (314) 4" letters, numbers and symbols (black letters and red numbers). Swinger Sidewalk Signs have a distinctive, eye-catching design that is as functional as it is attractive. The EZ Lock feature offers security by deterring unauthorized individuals from pulling out or tampering with the sign. Curved sign face deflects winds of up to 30+ mph. For added stability in windy conditions fill the ballast port with water or sand. Recessed wheels sit above ground level and engage when sign is tipped for rolling. When in use, the sign rests on four rubber feet.