If you want your message to get across, then spell it out in an enclosed letterboard. Your announcement or listing will stay secure behind shatter-resistant hinged doors that come equipped with disc tumbler locks. An attractive letter panel with its precision grooves for easy letter insertion provides a long-lasting background for your messages. Interior case depth is 1 5/16" for both aluminum and wood units. A set of 3/4" letters, numbers and characters is included. Letter panels are available in your choice of black, blue, brown or burgundy. Scroll below for additional sizes.