They seem cheap and can be a little painful to use without previous experience but they are really very strong if you tell me how do you install. The instructions provided are sparse, but minimal head scratching is required to get the job done. When I first used it I thought I had messed things up and uninstalled it, but I was able to build and install it with no problems. It sticks to the wall surprisingly well and I haven't had any issues with it other than my own unfounded doubts. It seems to me that with one of them I could attach a cinder block to the wall and use it as a shelf, they turned out to be very durable and I'm satisfied. Would buy again.
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