Spyderco Forums

I noticed that Spyderco called it a "front flipper" in the reveal catalog as well but the flipper tab is on the back of the knife. Why does the Mantra 4 qualify as a "front flipper?"


https://imgur.com/a/Qm7V61Y#8xfaSEM

Is that not that back of the knife?


I was just pointing out what ...

@Mushroom It certainly looks interesting.

I really like the design.

Mushroom wrote: ↑

Sat Oct 11, 2025 4:47 pm

I noticed that Spyderco called it a "front flipper" in the reveal catalog as well but the flipper tab is on the back of the knife. Why does the Mantra 4 qualify as a "front flipper?"

I was chatting with friends about how knives are packaged. Unfortunately, spy's packaging is just a cardboard box. I'm probably a "magpie," but I want a beautiful box. I have a buck, and it has a whole case. Cold steel also has a friend in a case. Chinese manufacturers put it in a purse. I really ...

@sal

Could we also get a trainer in this blade?

I like this model for concealed carry.

Golden, Colorado USA.

My favorite.

My experience has been similar so far. My MT46P tackled just over 3,200 linear feet of double wall cardboard before it quit cleanly cutting printer paper. I put my own 17° mirror edge on it finishing with a .5 micron diamond strop. (Thread going on the Mule Team forum for more detail) So far, it ...

Well done Vivi

Pacu0420 wrote: ↑

Sat Sep 06, 2025 9:35 am

Shawn, this was fun and very educational. Any plans on doing another one?

Yeah we can do one once a month or two.

Well the polls came in

250 Votes

Steel 1: 44%
Steel 2: 56%

The correct answer is steel 2

Librarian used simulation software to model elements in solution and an equation to measure the pitting resistance to reflect the enhancement of additional elements besides chromium in solution, He then ...

Also, what makes a steel retain that super sharp edge as opposed to "breaking down" into a working edge?


Differences in retained austenite, carbide size/volume, hardness, stress/fatigue, grain growth, plate martensite vs lath and heat build up during processing.

Lastly, your sharpening skill ...

What thermal process does each steel go through?


That's a very pertinent question.

Let's assume the Heat treatment is using best practices for corrosion resistance on both.

That would mean you could rule out comparing one in the annealed condition or comparing one that's using an erroneous ...

p_atrick wrote: ↑

Thu Sep 04, 2025 4:14 pm

Does Larrin's Knife Engineering book go over alloys and how they keep chromium in solution? I know bits and pieces of information, but clearly not as much as some of you all.

Tell us what you find.

Appreciate you guys sharing, let's see if any more people jump in and share their thoughts.

Between these two steels, which is more corrosion resistant and most importantly why?

Strong work.

Excellent creativity, a rudimentary test that can show differences between conditions with house hold items
sal this is what we need.

We'll call it the "Mage" Test.

https://imgur.com/a/A8SzVgZ


Yes, we see scatter but it could be smoothed out with more tests. 3 tests is the ...

Hey Shawn,

Your opinion on what physical tests would work best?

I've envisioned some type of "90 degree edge squashing" test.

sal


Sal,

That sounds interesting, do you think you can give us a rough test outline for the idea you have for a 90° edge squashing test?

Sounds like a great way to ...

As an aside, if you are just interested in high wear stainless steels, there are lots of grades out there that would dominate 110V, as they are designed as carbide replacements. These are becoming more common as intermediates between carbide and HSS as the balance is being found of just how ...

A great discussion is being had here, however, I think it's important for us to be more respectful to each other if possible.

We forget our community is a lot smaller than we imagine and we've lost a lot of good people over the past 5 years.


There simply aren't many of us that discuss things at ...

One thing at a time 👌






5 years ago.


@mage7
https://www.instagram.com/p/B_GYPjDjfax/?igsh=c2dpY3V5NmIzZnc1


Sweet! I've been wondering about that for a long time. Thanks for confirmation.



Yes they were and yes it matters. Anyone who is sharpening by hand for edge retention testing is ...