DuraLatch® Crossbracing Models DX1-30W30H, DX1-48W24H, and DX1-36W48H holds a square DuraLatch Roll-Up Sign. It has four heavy-duty, solid-tip steel posts that the Lift-The-Dot fasteners on the sign straps snap on to. The posts hold sign securely while the straps allow it to expand and contract to stay taut. For storing, crossbracing pivots to form one piece that the roll-up sign wraps around. For use with models 4815RBK, 4818®K, 4850RBK, 4860®K, 4884KET and 5018K.