Date: February 11, 2020
Great shutter. Installed on a stucco/block wall. Used a 5/32" masonry bit. Because aluminum screws were 3" long, I had to drill 2&1/4" deep, hard on drill. Suggest screw length of 2 &1/4", 1&1/2 drill depth, would be enough. I was surprised how well screws went into stucco/block without snapping off. Will buy another set , different size, for another window.