Kershaw 1660CF Ken Onion Leek Assisted Flipper Knife 3" CPM-154 Stonewashed Blade, Carbon Fiber Handles


MSRP* : $144.99 | You Save* : $53.04 (37%)
Part #: KS1660CF | Kershaw Knives
Earn 920 knifeREWARDS Points!


KS1660CF: 1660CF Leek, Carbon Fiber

Kershaw Knives

The famous Kershaw Leek goes upscale with a handsome new suit of carbon fiber. The carbon fiber handle also lightens this Leek's weight, making it an extremely comfortable EDC.

The razor-sharp blade of high-performance CPM-154 stainless steel means it can take care of a full range of cutting tasks. The blade is a modified drop-point, so it’s a good slicing knife, while the slim tip gives it piercing capability and the ability to do detailed work. The blade's stonewashed finish looks good and hides use scratches. The Carbon Fiber Leek features the SpeedSafe ambidextrous assisted opening system, so whether you’re left-handed or right-handed, just pull back on the flipper and the Leek’s blade is ready to go to work.

A secure frame lock keeps the blade locked during use and a Tip-Lock slider locks the blade closed when folded. The pocket clip can be configured for tip-up or tip-down carry and the handle is drilled to accept a lanyard. 

All-in-all, if you love Leeks, you're going to want to add this one to your collection.


  • Flipper - May be used with manual or assisted opening knives. Tee "flipper" is a protrusion on the back of the blade that the user can pull back on, or flip, in order to move the blade easily out of the handle.
  • SpeedSafe - Assists you to open any SpeedSafe knife quickly and easily with a manual push on the thumbstud or pull back on the flipper, built into many Kershaw best sellers.
  • Liner Lock - Locks the blade open during use; one side of the knife's steel "liner," the steel plate to which the handle scales are attached, moves into position behind the blade to securely lock it open.
  • Reversible - Pre-drilled holes in the handle enable the user to change either the tip position or the side on which the knife carries.
  • Made in The USA - When you see this on one of their knives, it means the knife was made in Kershaw's Tualatin, Oregon manufacturing facility by skilled Kershaw knifemakers.


  • Blade Length: 3.0" (7.6 cm)
  • Handle Length: 4.0" (10.2 cm)
  • Overall Length: 7.0" (17.9 cm)
  • Blade Steel: CPM-154 Stainless Steel
  • Blade Shape: Wharncliffe
  • Blade Finish: Stonewash
  • Handle Material: Carbon Fiber
  • Locking Mechanism: Liner Lock
  • Pocket Clip: Tip-Up/Down, Right Deep Carry
  • Weight: 2.3 oz. (68.0 g)
  • Designer: Ken Onion
  • Made in the USA
Pocket Clip
Pocket Clip Includes a pocket clip for easy accessibility and a more secure carry.
Carbon Fiber Handles
Carbon Fiber Handles Very strong and lightweight material. Provides an upscale and modern feel.
Made in USA
Made in USA This product is USA born and raised.
Kershaw 1660CF Ken Onion Leek Assisted Flipper Knife 3" CPM-154 Stonewashed Blade, Carbon Fiber Handlesrated 4.000 stars out of 5 (6 reviews)
4.0 out of 5 stars
5 star
4 star
3 star
2 star
1 star
Kershaw 1660CF Ken Onion Leek Assisted Flipper Knife 3" CPM-154 Stonewashed Blade, Carbon Fiber Handles
rated 3 stars out of 5
Just 4 Thought
Aug 14, 2019
Pros: Pocket Clip, Overall Quality, Ease of Opening, Weight, Handle Material, None
Cons: Lock Ease of Use, Blade Material
CPM-154 Shears Easily
This was my EDC knife for a while. Unfortunately, while trying to fold a trike wheel, I used the knife to dislodge a stuck pin. When the pin gave way, the wheel folded and the end of my knife was sheared-off in the locking mechanism. I prefer the 14C28N steel used in the other Leeks. The 14C28N is easier to sharpen (although it does not hold an edge as long as CPM-154) and seems a little tougher. Although, I suspect that if I used my current Leek (with 14C28N steel) it would badly bend if caught in a folding wheel mechanism if it too didn't just shear-off too.
Kershaw 1660CF Ken Onion Leek Assisted Flipper Knife 3" CPM-154 Stonewashed Blade, Carbon Fiber Handles
rated 5 stars out of 5
Texas Hill Country
Jan 15, 2019
Pros: Blade Material, Overall Quality, Handle Feel, Weight, Handle Material, None
Cons: Lock Ease of Use
Best of Breed
I have about 10 knives that are in the EDC rotation. I use a CRKT Ken Onion Wrinkle with its big fat round blade when I'm slitting open bag after bag of things like mulch. I use a Spyderco Delica 4 with a combo blade when I am cutting ropes, cord, and heavy string. Over time, though, for everyday carry, I have gravitated more and more to the Wharncliffe style blade, of which I have several. The Leek in general is the most satisfying of them all, and the Carbon Fiber in specific is for me ideal.I first bought a 1660SW Blue, and it is very pretty. I found, though, that it felt a little heavy in my pocket, so I tried out the 1660CF with its CPM154 blade. For me, the blade shape is perfection - the tip shape works great for precision cutting and trimming, while the blade is still strong enough for basic cutting and slicing work. The lighter weight makes it a delight to carry, and the improved steel holds an edge longer and, because of the blade shape, is not all that difficult to keep sharp.Additionally, all of the metal-handled Leeks are a little slippery. The carbon fiber is not.The one fly in the ointment is the stupid blade lock. If you ever needed to get at your knife because of a threat, you can be sure that it will have locked itself in place without your knowledge and you'll go down while you are fiddling with it. Most of us, I realize, are not using our pocket knives for self defense, but even in daily use the lock is annoying; I can't see why anyone would need such a thing. If you can overlook this (or disable it), this knife is, for my use, best of breed. I love the thing.
Kershaw 1660CF Ken Onion Leek Assisted Flipper Knife 3" CPM-154 Stonewashed Blade, Carbon Fiber Handles
rated 2 stars out of 5
Jan 08, 2018
Pros: Blade Sharpness, None
Cons: Handle Material, Overall Quality, Lock Ease of Use, Ease of Opening, Lock Type
Needs improvement
I agree with the Knife Guy below me. The blade is sharp, but this is the second one I've held/had that doesn't deploy properly nor does it lock up. I don't know what it is, all the other leeks seem to open and lock instantly; this on the other hand, does not. The carbon fiber is nice, but not that nice. It seems cheaply made but I'm not entirely familiar with this material. You might as well buy the frame lock version with the standard 14C28N Swedish steel (very good steel by the way). I expected better for this version, ESPECIALLY due to the fact that it's price is double what the most of the other leeks cost.
Read all 6 Reviews »
Portions of the following content are served by a 3rd party. If you have accessibility or usability difficulties related to this 3rd party content, please call 800.338.6799.


Subscribe to our Newsletter for exclusive offers!