This rappel ring could kill someone

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How strong are rappel rings? It only needs to be about 2x more than your weight to hold you during a rappel (in case you don't rappel smooth). Add a little safety ratio for good measure and it's super good enough. The problem is if it wears down. https://www.instagram.com/kevhamrich/ pulled this rolled aluminum SMC rappel ring off a popular route in Yosemite and it broke at 1.5kN instead of it's 14kN it is rate for, which is legitimately dangerous.