Thank you John for the reply. The catalog I was looking at is the 1989 Chouinard Equipment catalog, which gives a more emphatic statement saying "The ice screw should be used only with a locking carabiner ". This added emphasis was likely due to Chouinard's heightened concern over product liability. The catalog you were looking at was probably a 1988 one. But your response answered my question. I do have another question. Do you know why Black Diamond didn't continue with the reverse screw gate carabiners?
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