See, funny thing is.... you could take them rock climbing.
Go climb a thousand foot cliff, do some aid climbing maybe. Scale crevices that no person could access short of the use of special equipment. Hang a thousand feet off the deck... life held in thrawl by the strength of the rock and your technique at placing pieces to clip into.
Get into that and your $$$ will vanish quickly though.
Then again, yours are steel. Ugh, weight. That's out too then I suppose.
Yup, I guess rigging is all they're good for.
Afterall, if a tree climber got careless and lazy with them while they were high enough off the ground to KILL THEMSELF... they could forget some minor attention to detail. And that, amazingly enough, could end with death.
The fault would lay on the carabiner of course, since it's designed poorly for keeping fools out of harms way, and therefore isn't sufficient for tree work.
Happy rigging!