Great initial suction, but does not last

I tested the Grab Bar by attaching it to an office desk and lifting it up. The suction was great and I was able to lift the table several times. Afterwards, I installed it on large tiles on the wall outside of the bathtub. I grabbed it and yanked down on it and it held fine. I released the suction and re-engaged it again just in case. Five hours later, the bar was in the bathtub. I think if the bar is re-installed each time you want to use it, it's a fine product. However, if you meant to install it and leave it there for a long time, it might not be what you're looking for.

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