Leatherman Free K4 K4x Pocket Knife
Leatherman FREE K4 and K4x Pocket Knives

Leatherman FREE Pocket Knife: Magnetic ‘K-Series’ First Look

Rounding out Leatherman’s revolutionary FREE Series of magnetic multitools, the K-Series offers a new spin on the trusty pocket knife.

Leatherman made waves this year when it unveiled the FREE Series — magnetic waves, that is. By adding magnets into the tool’s architecture, Leatherman engineers introduced one-handed operation into the pliers-based multi.

It proved a hit. In our testing, we found the P2 made a good tool even better. And this month, the brand introduced the last of its inaugural FREE Series tools: the K-Series.

Leatherman Free knife in table
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With a 3.3-inch 420HC steel blade as its centerpiece, the K-Series comprises four different tools: the K2, K2x, K4, and K4x. The K2 sports seven auxiliary tools while the K4 has eight. And the “x” denotes a combo serrated blade.

We unboxed a K4 for this first look. You can also take a look at the video review below to see all the features in action.

In short: While less flashy than the pliers-based P Series, the K4 also seems to benefit from the FREE line’s tech. With practice, users can flip the blade open one-handed. And perhaps more importantly, the magnets make accessing all the K4’s accessory tools easier.

Leatherman FREE K4 Knife Multitool Review

Let’s start with obvious: the blade. The 420HC is pretty standard and helps keeps the K4’s cost under $100. It’s not a terribly hard steel, so it won’t hold an edge as well as higher-end steels. But it’s easier to sharpen and generally pretty tough. So it’s a good choice for the money.

Leatherman Free K4 Pocket Knife

As for the tools, the K4 gives you everything the K2 does — extra-small and medium flathead drivers, Phillips driver, bottle opener, awl, pry tool, and package opener, all packed onto three implements. Plus, the K4 adds a spring-loaded scissors to the mix (which the K2 lacks), bringing the total tool count to eight — not including the knife.

Like the P Series before it, the K-Series uses its built-in magnet to hold the tools closed. This is important because it makes the tools easier to access than Leathermans past.

Instead of trying to pick open the tools with a fingernail — Leatherman has received its share of “busted nail” complaints over the years — the K4 opens itself with a smooth thumb roll. Doing so fans out all of the tools, allowing you to select an implement more easily.

Leatherman Free K4 Pocket Knife

Leatherman FREE K-Series Knife

  • Weight: 5.5 oz. (K4) / 4.9 oz. (K2)
  • Closed length: 4.5″
  • Blade length: 3.3″
  • Price: $90 (K4, K4x) / $80 (K2, K2x)
  • Tools:
    • 420HC knife (w/combo blade — K2x, K4x)
    • Pry tool
    • Package opener
    • Awl
    • Bottle opener
    • Phillips screwdriver
    • Medium flathead screwdriver
    • Extra-small flathead screwdriver
    • Spring-action scissors (K4, K4x only)

Is this the right pocket knife for you? It seems the K-Series will work great for those who either don’t want to shell out the $120-140 for a P Series or who just don’t need that many tools.

There are higher-end pocket knives out there that really require a hard, long-lasting blade. But for the generalist who needs a knife and some occasional daily tools, the K-Series provides an easier-to-use option over Leatherman’s pocket knife predecessors.

Adam Ruggiero

Adam Ruggiero is the editor-in-chief of GearJunkie and a fan of virtually all sports and activities. From biking, running, and (not enough) surfing, to ball sports, camping, and cattle farming — if it's outside, it's worth doing. Adam graduated from the University of Minnesota with a BA in journalism. Likes: unique beer, dogs, stories. Like nots: neckties, escalators, manicured lawns.