All these do for me is hold my gear to my rack. They're great and have a nice smooth action. Do I really have to say it though... it's a hook nose biner. Not exactly a climber's friendly tool. So just to attach my shoes to my backpack or to attach some protection to my rack either way that's all I see these good for. I guess just having a few carabiners lying around that are climbing rated can't hurt.
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