These are clear vinyl "stickers" with two square holes. You stick them to the punched out rectangular hole in the top of the blinds, line up the sticker holes, and then you're ready to hang them again. Not sure how strong they will be but definitely better than the strap we tried before. There are other things designed for the same purpose. I've found some that are a little heavier than vinyl and kinda "snap into place". So now I have something hanging from each. We'll see who lives the longest<LOL>I. I don't see why you can't use two of these on the same grille when you have a lot of traffic pushing the grille aside to get in or out through a slat-shaded door.
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