Highest cutting performance per ounce

[cjk]

This is a thread about the highest cutting performance per ounce. I'd like to see where it goes.

At times I've been into 'fancy' knives, but I have really developed a great appreciation for knives that possess a very high level of performance for their weight. This usually means unlined FRN handles and high performance steel. The UKPK lightweights weigh a scant 1.7 ounces. The FRN Dragonfly 2 is a mere 1.3 oz. I was thinking how to compare the following:

* The serrated Magnacut UKPK Salt (or the Native 5 or Native Chief)
* The K390 Dragonfly 2
* The ZDP-189 Dragonfly 2
* The Native 5 lightweight in 15V
* The upcoming lil Native lightweight in 15V (1.5 oz?)
* The Stretch 2 XL in K390

I figured I'd compare edge length / ounce even though this would ignore the steel properties.

The UKPK and the Dragonfly actually offer the best edge per ounce ratio!



It was inspired by a thread about the new serrated Magnacut UKPK, where @sal mentioned

Hi Cjk,

I've been carrying mine for a few days now. Quite the tool. Light and convenient with a great deal of cutting power. I was thinking that if we had a definition of CutPower/weight, it would rate very high. (Like Horsepower/weight).

sal

Link to thread: viewtopic.php?p=1878290#p1878290

[LadybugMan]

I think the word "performance" in the thread title is a misnomer as the graph simply equates to the longest edge length per ounce. It does not take into account blade geometry or blade stock thickness.

In any case, the hands down winner would be the Ladybug. At an edge length of 1.70 inches, it is very close to the Dragonfly but in terms of weight it is only 0.6oz - less than half the weight of the Dragonfly.

So, IMHO, the Ladybug easily beats the Dragonfly.

[JARHEAD]

This will be a great thread. Just for the response’s!
Just for data points and my 1/2 cent worth:
1. Weight is adaptable and sometimes welcome!
2. Aggressive edge, Aggressive cutting (very important)
3. I gave my Mother a UKPN lc200n, her first Spyderco…. She raves at it constantly! I can’t believe how easily it cuts through this and slices that!
4. I feel the Native Chief is a bit better for me than the Military 2 because I gravitated toward more spear point in my younger years. As far as cutting to weight… I don’t really notice it’s the geometry of the serrations I notice more. And the stock thickness.

Hopefully this is useful.

[cjk]

I think the word "performance" in the thread title is a misnomer as the graph simply equates to the longest edge length per ounce. It does not take into account blade geometry or blade stock thickness.

In any case, the hands down winner would be the Ladybug. At an edge length of 1.70 inches, it is very close to the Dragonfly but in terms of weight it is only 0.6oz - less than half the weight of the Dragonfly.

So, IMHO, the Ladybug easily beats the Dragonfly.

I concur with your objections. You're correct about the Ladybug. I hadn't even considered anything smaller than the Dragonfly as it's the smallest thing that I seem to be able to get along with.

[vivi]

Catcherman needs mentioned. Length per ounce and stock thickness.

I like bringing it on backpacking trips to pair with a stout fixed blade. I use it for food and the FB for everything else.

[srivats]

I concur with your objections. You're correct about the Ladybug. I hadn't even considered anything smaller than the Dragonfly as it's the smallest thing that I seem to be able to get along with.

You also have to consider the size/time of the cutting task .. for some extended tasks, the handle size and shape will start to matter more than edge length per oz.

[BeggarSo]

Ha Chaparral SE smokes all of them hands down without a doubt boom!

[Cletus]

My regular UPS guy is a very nice, hard working man. He whipped out a gas station special one day with literally no edge and commenced to saw away at a strap. I went into the house and grabbed a UKPK in SPY27 and gave it to him. That was almost a year ago, and he still raves about the knife. The UKPK and the Dragonfly cut way beyond their size. The Dragonfly Wharncliffe in K390 sans clip is always in my pocket.

[Flash]

Weighing in at 0.8oz and with a cutting edge of 2.8 inches, The Charisma will smoke everything else when it’s finally released.

[Wartstein]

Screen Shot 2026-04-08 at 6.06.37 PM.png

I think the SE LC200N=ffg versions of Salt 2 and Pac Salt 2 sometimes get overlooked when it comes to the topic of this thread.
I´ve been using the term "best weight to performance ratio Spydies" quite a bit for both ("performance" a bit broader than "cutting performance", for example can a lock imo enhance performance in certain tasks compared to a slip joint like a longer edge can compared to a shorter one)

Salt 2 ffg: Edge length 2.65" / Weight 1.9 oz / Ratio 1.395

Pac Salt 2 ffg: Edge length 3.39" / Weight 2.6 oz / Ratio 1.304

So both "beat" I think all other locking Spydies in their size range (Salt 2 for example easily Native 5 LW or Para 3 LW, Pac Salt 2 just soso the Stretch XL)

[Wartstein]

Ha Chaparral SE smokes all of them hands down without a doubt boom!

If one (as it should be) defines "cutting performance" by more than just "edge length", the FRN Chap SE could very well be the winner here... despite its "edge to weight ratio" is though really good still not the best:

FRN Chaparral SE: Edge length 2.35 " / weight 2.1 oz / Ratio 1.119

[kennethsime]

There have been a few similar threads in the past, and I agree that it’s a useful metric to consider. I enjoy doing more with less.

Here’s a spreadsheet I made with some popular models.

[Doc Dan]

I think the UKPK is my favorite in this regard. I keep one in my pocket daily and it has replaced everything else. It has a great cutting edge and the knife is thin and light. It even kicked the DF out of my pocket!

[zhyla]

Next time you’re cutting something take a look at the edge. If you’re using more than an inch of it post a picture

[Wartstein]

Next time you’re cutting something take a look at the edge. If you’re using more than an inch of it post a picture

Cut cardboard effiently with a long edge? Slice a breadloaf? Whittle a pointy stick? ... just the first three examples that immediately came to mind...

Also: Even in tasks where one only uses an inch of the edge: If that inch starts to dull, on a longer edge there are several more left to work with...

[Paul Ardbeg]

You also have to consider the size/time of the cutting task .. for some extended tasks, the handle size and shape will start to matter more than edge length per oz.
[/quote]

My thoughts as well. On paper the Manbug has excellent edge to weight ratio, but for bigger tasks and longer use I prefer the Native 5 or Manix 2. They all have there use.

[Evil D]

We can split this hair a dozen different ways. My answer will probably always be either a Ladybug Salt or Dragonfly Salt. The Ladybug weighs so little it's irrelevant and it cuts a lot better than no knife at all.

[BeggarSo]

Next time you’re cutting something take a look at the edge. If you’re using more than an inch of it post a picture

Cut cardboard effiently with a long edge? Slice a breadloaf? Whittle a pointy stick? ... just the first three examples that immediately came to mind...

Also: Even in tasks where one only uses an inch of the edge: If that inch starts to dull, on a longer edge there are several more left to work with...

That’s why we want the XL Chaparral.

[cjk]

Updated for the comments.
@vivi The Catcherman beats out the UKPK lightweight.
@Flash You're correct about the Charisma. It decimates all.
@Wartstein Yes, the FFG Salt 2s are worthy of being considered.

[cjk]

I think the word "performance" in the thread title is a misnomer as the graph simply equates to the longest edge length per ounce. It does not take into account blade geometry or blade stock thickness.
....

After a little more thought, weight actually DOES take into account stock thickness, though abstractly.
Thicker blades weigh more.
Blades with thicker geometry will weigh more.
All of the "winners" have thinner blades.
The Native 5 and Native Chief are "penalized" by thicker blade stock.
The Chaparral is "penalized" by having liners, but still has a higher length to weight ratio than the Native 5 lightweight.
This exercise isn't perfect, but it's interesting.