I bought two sets. Literally half of them broke either during the initial disassembly or right after assembly. Those that didn't slow survived multiple lock/unlock cycles with no signs of fatigue. I would trust those that have gone through 5-7 on/off cycles. I spent the money I saved throwing half of it away. The wasted time and the sight of the plastic going to landfill was disappointing to say the least. I wouldn't buy again if you want to save a few bucks I think go for it but it seems wasteful.
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