The shelving is nice(seemed a little flimsy when assembling) but as it went together it got sturdier and sturdier. Frame locks together solidly. Was able to use through bolts to bolt 2 of these units together and used the frame assembly holes to attatch it to a wall in my shop. Worked Great and adds lots of storage. Only complaint I have has nothing to do with the product, but is regarding the shipper. Items arrived with almost destroyed packaging, had been walked on(boot prints visible), and the strapping that specifically states on packaging do not lift by straps had been lifted by the straps enough that half of them were broken and left them behind my wifes car in the car port so she couldn't have used her car if she needed to. Shop Your Way - might discuss this with your shipping company! There were also minor bends from shipping handling - I was able to straighten them out and am still happy with the shelves! Need 2 people to assemble, took approx. 20 minutes each.