No longer any need to hire a contractor to install expensive shutters. PLYLOX window clips are easy to install and come in various sizes to fit the most popular plywood widths (1/2", 5/8" and 3/4"). We just used these for hurricane Matthew and they made boarding up (and unboarding) so incredibly easy! No damage to our windows that are only a couple of years old and no damage to our brick house. Awesome that you don't have to drill through anything. I would recommend adding these to your hurricane kit if you don't already have them.