For a tough little knife, the REKAT fang in ats34 is probably the hardest to beat up. The 1095 not far behind. Haven't been able to damage either one although I have tried.
For a large knife, anyone of the HI khukuri
models is hard to beat. And believe me, I have tried just about everything. (BTW if you do trash a HI khukuri, Bill will replace it, no Bull #$%$, no negative comments about you on the forum, he will just make it right.)
I am not as scientific as Cliff, but probably just as brutal. Will do the the same testing when the battle mistress arrives in the next month or so. Pocket folders are one area I have not tried to test or abuse, yet.
What? Another knife? Don't you have enough of those things already?
How many does one person need?
And just what are you going to do with this one that you can't do with the others?
What is the purpose of all these knives anyhow??