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These things are only a threat to very inexperienced divers and those who do not carry knives. I use carabiners for just about everything when I am working underwater, usually in zero vis, and regular gate clips for a couple of small items when sport diving. I have never had them attach to anything on their own during thousands of hours of diving. If something this simple is going to kill you then you might want to rethink going diving at all.
These are called "locking carabiners," in case anyone wants to know.I use them to secure expensive heavy gear like my video housing that also gets handed up onto the boat. But I use the locking kind sold for climbing - the knurled ring screws down over the part that opens. They're about $10. ex:
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The risk with a twist carabina is when they sieze due to salt water. I use quick links and they can sieze sometimes and need a spanner to undo. A good quality SS bolt snap should be fine. I find brass bolt snaps are not as good or strong and SS.