Strong enough to support our canning from this years harvest and to organize the pantry. Even though it has wheel locks, I love the back supports. We just feel safer as we would hate to loose a 500ml jar of preserves! I bought an extra shelf for the top and spaced the shelves around 141/2" from the top down, allowing the 4" wheels to give me around the same clearance from the bottom shelf and the floor. Great!
