I have fitted them to both interior walls of my resin sunroof shed. I recommend first attaching a 1/2' x 10' x 6' board or something similar to the wall and, if possible, the metal. Then use short 1/4 inch wood screws to attach each of these organizers. Thanks to this, the structure became very strong and it was possible to hang on it not only tools, but also sprayers filled with contents. Very happy with these organizers. Very versatile thanks to the additional small square hooks in addition to the garden tool hooks. Well made products and affordable.
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