These are very small containers that are not designed to carry much weight. I wasn't sure what to expect, but they worked well for my range of PC parts: CPUs, memory, screws, small PC tools, etc. I wouldn't recommend them for attaching real screws or roofing screws. The back panel is not strong enough to withstand a large load. It is made of lightweight plastic which is why I only gave the product 4 stars. The boxes are strong enough, even small ones, to carry a heavier load. I will most likely be putting these containers on the shelves of my closet, so will buy more in the future as needed.
Efficient Upside Out Organizer: Convenient Adjustable Storage Solution
11 Review
Maximize Your Bathroom Space with the Stainless Mounted Storage Organizer
11 Review
ποΈ IMILLET Storage Organizer Mount Holder
10 Review
Get Organized with Vanitek's Heavy Duty Magnetic Workshop Organizer".
12 Review