Enclosed lockable bulletin boards are perfect and functional solution to display your posters in any office or commercial environment. The 36×48 inches outdoor poster board has a sturdy aluminum frame in silver matte color, mounts vertically or horizontally. Bulletin board case depth is 1.06 inches. Shatter resistant polycarbonate door can be opened to 90 degrees. 2 door stays at each end help to keep the door open. The board has a hidden lock on the side that is not visible from the front. You can switch the signs, the posters on the wall, without having to take the enclosed bulletin board off the wall. Simply slide your sign into clear clips and close the door. Wall mounting hardware and 1 key set of single variation is supplied with each board. changing signs. A great choice for signs that change often.