Thanks for your questions about users' perceptions on pull strength and opening methods, Jack. They led to discussion I found very interesting and informative.



The pile side of your ironwood is probably not as showy as the mark side, but the grain still would produce some fascinating fluid flow vector fields!!


Good to hear your opinion, Dave.


I agree with your final phrase that the effectiveness of various methods of opening folders depends a LOT on minor differences in specific technique.
Now THERE'S an example of foolproof pinching technique!!



I've said before that I'm mainly at BF for the nostalgia, and your pic really took me back, Jer! I haven't used or thought about fencing pliers in 50 years, even though I used them all the time when I was a kid fixing fences on the cow pastures.


Another winning technique IMHO, but one I probably lack the skills to implement!


Regarding Cracker Jack, my AC, I'm in Joshua's situation: I can pinch it open about half the time I try, and it apparently depends on very subtle factors I haven't clearly identified.

I'm tempted to try this on some of my knives with the hardest pulls (not lambsfoots), but I think I'd need more details about the procedure before doing so.

Thanks for pointing this out, John.



Part of my "pinching technique" for most knives I pinch open that I didn't even realize until now is that my pinch forces the pad of my thumb into the nail nick, so I'm technically using the nail nick to help me open the blade, but the entire nick is filled with "pressed flesh" instead of just having a small sliver of nail pushing against the top edge of the nick.
I side with Michael rather than Vince on the 2-blade issue, I think. I'd at least like to try a lambsfoot with a secondary blade sometime.
Unfortunately for those of us who like 2-blade knives, that seems to be uncommon, David.

Glad you're not fighting THAT fight!

As usual, Barrett, this is an impressive and thorough analysis!!



I agree with both Barrett's and Dylan's observations that patina enhances the "pinchability" of a blade. All of my lambsfoots are users with patina, and they became easier to open as the patina developed. The biggest obstacle to pinching them open that I face is my own fault: several have not had the joint adequately flushed, I think. I always wash and oil them on arrival, but it sounds like many people put much more time and effort into the initial flushing than I do.
Christian is not alone in noting that he perceives his lambsfoot to have a relatively challenging pull. This surprises me, because I don't perceive my lambsfoots as having very heavy pulls. In fact, a couple of weeks ago,
@JB in SC asked me about the pull on mine because he was considering getting a lambsfoot. I wrote this in reply:
Maybe Jerry should get a second opinion!

Chin seems to corroborate other conjectures about blade features that facilitate pinching.




Chin, I've also idly speculated that a lambsfoot/spey blade combo would be useful (I usually suggest putting them in a mini trapper frame).
I've often wondered about the magnitude of the differences in thickness behind the edge. A difference of .01 inch doesn't seem detectable to the naked eye, but it's interesting that you've found that the difference in performance is definitely noticeable.
- GT