UFO's are fabric wedges with climbing shoe rubber that are between a nut and a cam. They are used in Czech Republic and some parts of Germany and Switzerland where the rock is so fragile that they outlawed metal protection. Would you whip on these?
IF it held it was stronger than a cam at 23.06kN, but it would also slip out at 1kn to 4kn. When it slipped, it would delaminate the rubber. It worked better as a nut than a cam. Fun unique climbing gear to see how it works. @Jenny.Lemonpie says they are a bitch to place one handed.
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