- Kershaw Blur 1670 · Drop Point3.4″ blade · 0.121″ spine · 3.9 oz · ~1.2″ tall
Kershaw Blur 1670
The Kershaw Blur 1670 is a 3.4" drop point folder in Sandvik 14C28N, hollow ground. The handle is Aluminum + Trac-Tec, secured by a liner lock. At 3.9 oz it sits 42nd-lightest of the 61 EDC folders here, where the median is 3.2 oz.
- Blade
- 3.4″
- Weight
- 3.9 oz
- Steel
- Sandvik 14C28N
- Price band
- Premium
Everyday carry and general utility
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Specifications
Manufacturer-published figures, cross-checked against knifeworks, bladehq.
- Blade length
- 3.4″
- Spine thickness
- 0.121″
- Blade shape
- Drop Point
- Grind
- Hollow
- Steel
- Sandvik 14C28N
- Overall length
- 7.9″
- Closed length
- 4.5″
- Weight
- 3.9 oz
- Lock
- Liner
- Deployment
- Assisted
- Handle material
- Aluminum + Trac-Tec
- Country of origin
- USA
Why a drop point
The default hunting and EDC shape, and the safest general answer. The spine curves down to the tip in a convex line, which keeps the point low and strong and leaves plenty of belly for skinning. It is hard to make a drop point bad at anything.
Every drop point here →About Sandvik 14C28N
Developed with Kershaw. Tough, rust-resistant, and about as easy to sharpen as a good steel gets — the reason it dominates the value tier.
1-5 is a relative ranking drawn from published composition and hardness, not a lab measurement. Higher is better on every axis, and no steel is a 5 across the board — edge retention and toughness pull against each other. All Sandvik 14C28N knives
What owners say
Drawn from 255 owner discussions of the Kershaw Blur 1670 since 2024. The opinions are theirs. The specifications above come from the maker.
What owners like
- Lasts through years of daily work: one owner carried theirs for about ten years from 2005 or 2006, including time as an EMT, and another says a 20-year-old Blur still opens concrete bags and packages for their dad every day
- Takes abuse: one owner's serrated tanto Blur was run over and dragged by a forklift, and after the scales and screws were straightened it became their garage knife; a diesel mechanic calls theirs tough as hell
- Holds its tolerances: one owner given a Blur a friend had carried for 15 years found zero blade play, a centered blade and solid action and lockup
- The aluminum scales with Trac-Tec inserts give a secure hold: one owner bought theirs for the nonskid grip with gloves on, and another calls the scales solid, ergonomic and grippy on a knife that is light for its size
- The 14C28N recurve is a strong slicer: one owner of an older 14C28N Blur says it has always been very sharp and cuts well through the belly of the curve
- Kershaw backs older knives: one owner whose spring broke in 2008 got two springs, a Torx driver and spare clip screws, another had a broken blade fixed and returned in about three weeks, and a farm owner had a snapped tip repaired under warranty
- Converts to a manual flipper: one owner pulled the assist spring, bent the lockbar slightly and says the detent is great afterwards, and a MagnaCut owner thinks their detent is strong enough to de-assist
- Aftermarket deep-carry clips fit it: one owner added an MXG Gear clip, and another knife user recommends Lynch's
What owners flag
- The stock clip is not deep carry: one owner who prefers deep carry paid $24 for an aftermarket clip in 2024, almost half what the knife cost
- Tips and blades do break in hard use: one farm owner broke two tips across ten years of carry and then found a crack forming at the thumb stud, and another broke the blade on a factory second that the warranty does not cover
- Detent and centering vary from knife to knife: one 2024 buyer's detent was stiff enough that the thumb studs tore at a fingernail, and backing off the pivot let the blade rub the handle; one owner of an Elmax Blur had late, sticky lockup and a blade that sat off center
- Lock trust is not universal: one owner of a de-assisted MagnaCut Blur says the liner lock fails a spine-whack test every time, and another had a Blur open itself in a back pocket a couple of times
- Assist springs can give out: one owner's spring died after four weeks of opening the knife hundreds of times a day, and another's broke in 2008
- The recurve has its critics: one owner found the Blur a little harder to sharpen, another says it taught them that recurves look cool but are not worth it, and a third wishes it were not a recurve
- The rubbery Trac-Tec inserts catch on fabric and hold dirt: one owner hated how they dragged going in and out of a pocket, and another could not wash dried mud out of the texture
- The closed blade's tip reaches the inside edge of the handle, so one owner notes you can cut yourself reaching into the pocket for it
Ten, fifteen and twenty years of carry come up again and again with the Blur: an EMT's knife from 2005, a dad's 20-year-old concrete-bag opener, a mechanic's pocket kit, a forklift-flattened tanto that went back into service. People choose the 3.4-inch 14C28N blade and aluminum handle as a work knife at a mid price, and more than one owner names it as the knife that started a collection before moving on to a Spyderco Manix 2, Endura 4 or PM2.
Grip and toughness draw the praise, the clip and the recurve draw the complaints. The Trac-Tec inserts hold well with gloves for one owner but dragged in another's pocket and trapped mud for a third, the stock clip is not deep carry, and one owner found the recurve a little harder to sharpen. Individual knives vary: owners report both a detent stiff enough to hurt and a lock that fails a spine-whack test, plus the occasional broken spring, for which Kershaw has sent replacements.
Within Kershaw, one owner moved to the smaller Leek for discreet office carry and another upgraded to the Bel-Air, while some buy the Blur itself in S30V or MagnaCut; one owner notes the MagnaCut model swaps the standard hollow grind for a flat grind. One owner who disliked the assist pulled the spring, though a buyer who loves the Blur's feel but wants a fully manual knife asked for alternatives instead.
Can you take the assist out of a Blur?
Yes. One owner took the assist out, bent the lockbar slightly and says the detent ended up great, and a MagnaCut owner thinks their detent is strong enough to de-assist. Another owner who removed the spring as a child found the lack of detent annoying and put it back.
Is the standard 14C28N worth it, or should I get the S30V or MagnaCut Blur?
One owner of a 14C28N Blur says it has always been very sharp and cuts well. An owner of a 2012 S30V Blur found it chips before it rolls and would not take a very fine edge, enough to put them off that steel. The MagnaCut version also changes the grind: one owner notes it is flat ground where the 14C28N model is hollow ground, and still very slicey.
What deep-carry clip fits the Blur?
One owner added an MXG Gear deep-carry clip, another knife user recommends Lynch's, and another owner paid $24 for an aftermarket clip in 2024. Not everyone wants one: others point out the Blur dates from 2004, before deep carry caught on, and that a high clip is easier to grab on a work knife.
How does Kershaw handle warranty on the Blur?
Several owners report good outcomes: replacement springs and screws for a 2008 knife, a broken blade fixed in about three weeks, and a ten-year-old Elmax Blur returned with perfect centering and lockup at no charge. Factory seconds are not covered, which left one owner hunting for a replacement blade. One owner who believes their gifted MagnaCut Blur was a returned knife with a 14C28N blade swapped in says Kershaw refused to fit a MagnaCut blade.
How do you sharpen the recurve?
One owner sharpens an M4 Blur on standard Work Sharp diamond plates with no trouble, while another found the Blur a little harder to sharpen. One owner who lived in Portland says Kershaw's headquarters would sharpen it for free.
How can you tell if a Blur is fake?
Owners asking about this compared marks against genuine knives. One with a suspect S30V Blur noted a clip with a pointed end that did not line up with the scales, and another who paid $45 on eBay in 2024 found the Ken Onion and USA markings missing and a longer thumb stud than on Kershaw's own photos.
Features
- Assisted opening
- Liner lock
- Hollow grind
- Made in USA
- Stainless blade
