Built-in automatic roller lock prevents billowing. No need for manual locks or wind deflectors. Lock automatically engages when room is closed and automatically unlocks when the room is deployed. Mounting brackets are made of heavy-duty extruded aluminum and retrofit most other brands of slide-out awning mounting brackets for easy replacement. Fabric and roller tube assembly sold separately. Short Hardware fits flange heights of 0 to 3.25 . | Carefree of Colorado Slide-Out Cover Hardware, White Short Hardware for Slide-Out Cover