Bought them. Learned how to lock them. Folded them back up and put them in my luggage. Left on a trip a couple days later with only one of the poles and used it for 3 hours. Tried to fold it back up and the o-ring was broken making it useless. I was told I needed to return it to the store, but can't take it back on the plane in this partially folded arrangement. Now I have no pole to use for the rest of this trip and I'm out $50.
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