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

Twin Slot Shelving twin slot shelving kit 2, 3 or 4 Shelf Kits available with White, Black or Maple shelvesEach kit comes complete with wall mounted shelving uprightsShelf Brackets and melemine faced twin slot accessories Twin slot & single slot shelving ✓ customisable ✓ various shelf boards + brackets ✓ for storage + organisation » order your twin slot

twin slot shelves Rothley Twin Slot Shelving Kit 1600mm Upright 216mm Brackets White from Construction Supplies