Are twin slot brackets strong enough to support a shelf layout?

Product Description Zamba Wall Mounted Twin Slot shelving kits ideal for the garage or garden shed

Key Features of Twin Slot Wall Mounted Shelving Fixing Packs Each shelf fixing pack contains 10x 2 screws and 10x 1 screws Screw holes are

twin slot shelving White Twin Slot Wall Mounted Shelving Kits · Simple, practical and adaptable wall-mounted storage · Drop-and-lock bracket design prevents shelves from being

twin win slot game In this film I install some twin slot rail and bracket shelving in the garage Fitting it around the up