Reviews and Ratings for Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts

Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Insertsrated 4 stars out of 5 (6 reviews)
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Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4 inch CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts

 

Price: $134.99

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Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts
rated 5 stars out of 5
Roar
HI
Aug 07, 2026
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip, Weight
Cons: None

Just got the thing

The thing showed up absolutely razor sharp. We will see how long that lasts. I'm really excited to test out the magnacut steel here in Hawaii.
Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts
rated 5 stars out of 5
Jeff
PA
Aug 20, 2025
Pros: Blade Material, Blade Sharpness, Ease of Opening, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip
Cons: Handle Material

Magnacut

Finally a Blur in magnacut
Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts
rated 4 stars out of 5
Iamtoast
In a state of denial
Jan 31, 2024
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Material, Lock Ease of Use, Overall Quality, Weight
Cons: Handle Feel, Lock Type, Pocket Clip

Good, but needs updating.

Mine came very sharp, the grinds are well done and even. I prefer titanium and/or CF handles but beside the over aggressive skateboard tape like inserts, the solidity of the handle fees very nice. Assisted opening knives are not my preference but this one opems with authority. The high flat-saber grind is good for slicing while the somewhat subtle recurve provides all that shapes benefits with at least some ability to touch up or shapen the edge less than impossible. The thumb studs are not my preferred opener style but the shape on these is a treat for that category and has aggressive jimping to reduce slipping. I like the knife even though I purchased it mainly for a project and the blade steel, I'm impressed w/ the feel, minus skateboard tape, and I'm enjoying using and opening the blade. As for updates, I don't see much point to assisted opening knives now that flippers provide as good, if not better, opening. A front flipper could easily be added amd ignored by those who like them less than studs. I'm liking the knife, as is, significantly more than I predicted. Note: one idea for overly aggressive textures is to subtlety add a clear glue / apoxy to the areas causing the most issue, like under the pocket clip, filling the cavities to your desired amount or overfilling them then using sandpaper.
Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts
rated 4 stars out of 5
Mark
USA
Apr 09, 2026
Pros: Blade Material, Blade Sharpness, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Weight
Cons: Ease of Opening, Pocket Clip, Sheath

Good Knife

I like the knife very much. The handle grip is great if you work it wet conditions like do. Has a nice overall feel to it. My only issue and it’s my fault I did not realize it utilizes the pin style on the blade for opening as oppose to the quick lever on the back. I find this style especially on this particular knife difficult to open.
Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts
rated 4 stars out of 5
Fpane
So Cal
Dec 16, 2024
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip, Weight
Cons: Sheath

Almost Excellent

I like everything about it except the finish of the blade, it is kind of rough compared to my other black finished Blurs. The only reason I bought it was because i had to have my favorite knife in Magnacut. If I were to buy it again I would get the blue one with uncoated blade.
Kershaw 1670BLKMAG Ken Onion Blur Assisted Folding Knife 3.4" CPM-MagnaCut Black Blade, Black Aluminum Handles w/ Trac-Tec Inserts
rated 2 stars out of 5
Phillip
Roseville, Mn
Jan 01, 2024
Pros: Blade Material, Ease of Opening, Lock Type
Cons: Blade Sharpness, Handle Feel, Handle Material, Lock Ease of Use, Pocket Clip

poor clip

The texture of the scales I could live with if the clip wasn't so miserable to use. Not the sharpest but used a strap on it and now it's not too bad. The action is nice. I have not used it long enough to have an opinion on the blade steel. I might update this in the future. As it sits now I don't think it's going to be my favorite every day carry. I'll probably buy an upgraded clip for it. The scales are so rough they added friction going it out of my pocket will probably wear my pants out prematurely. Not sure how to fix it. I wish prematurely. Not sure how to fix it. I wish I would've sent it back right away but I had to try it. Now I would've sent it back right away but I had to try it.
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