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

Twin Slot Stainless Steel Shelving Brackets twin slot shelving brackets Buy Twin Slot Brackets at The UK's leading retailer of trade tools and hardware Free returns Delivery 7 days a week Products reviewed by the twin spin slot review 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 spin slot gratis A garage, workshop & storage area classic Uprights fixed to your wall with slot in brackets ready to hold a shelf