Dulling a pocket knife is easy. Restoring its edge is the part that takes work.
Price: $25.99
Where to Buy: Amazon
Spend enough time cutting cardboard, cord, packaging, food, or other everyday materials and even a good blade eventually needs attention. You can carry sharpening equipment and maintain the edge yourself, but that adds another job to owning a knife. If you primarily want something that cuts rather than another piece of gear to maintain, there is a simpler approach.
The Outdoor Edge Onyx EDC 3.5-inch is built around replaceable blades. When the current edge is no longer performing the way you want, Outdoor Edge’s RazorSafe system lets you remove it and install a fresh blade without tools.
You can still resharpen the blades if you want. The important difference is that you do not have to sharpen one before getting back to work.
A 3.5-inch blade in a 2.6-ounce knife
Outdoor Edge specifies a 3.5-inch, or 8.9 cm, blade and an 8-inch overall length for this version of the Onyx EDC. The complete knife weighs 2.6 ounces, or 77 grams.
Keeping that weight down is a one-piece Grivory handle. Grivory is Outdoor Edge’s glass-filled nylon handle material, and the company molds its Trimond texture directly into it for added grip.
The resulting construction is noticeably different from a traditional folder built around metal liners and heavier handle scales. That is not necessarily a disadvantage when portability matters. At 2.6 ounces, the Onyx provides a 3.5-inch cutting edge without adding much weight to a pocket or pack.
That low weight comes with a tradeoff. Backpacker testers liked the low weight but described the polymer construction as feeling inexpensive compared with more substantial knives. That is worth knowing if materials and premium feel matter as much to you as cutting ability.
RazorSafe is the reason to choose the Onyx
The replaceable-blade system is what separates the Onyx from an ordinary inexpensive folder.
Press the blade-release button and the blade slides out of its reusable holder. A fresh blade then slides into the same holder. Outdoor Edge says the Onyx EDC includes three blades total and works with its 3.5-inch 350-series replacement blades, though retailer listings and bundles can vary, so check the exact package before ordering.
The blades are Japanese 420J2 stainless steel rated at 55–56 HRC in Outdoor Edge’s catalog. The reusable blade holder is 420J2 stainless steel with a black-oxide coating.
This is not a knife built around buying an expensive premium-steel blade and preserving that edge for years. The cutting blade is intentionally replaceable.
That can be particularly useful for jobs that chew through edges. Instead of worrying about what another stack of cardboard will do to your knife, you can use the blade, sharpen it later if you want, or replace it once its performance drops far enough.
The thin blade has limits
Replaceable should not be confused with indestructible.
Backpacker tested the Onyx on food and small pieces of wood and reported no blade wobble during those normal cutting jobs. One tester also carried the knife for 20 consecutive days and found the blade-change system straightforward to use.
The same testing exposed an important limitation: a blade broke when the tester tried using it to pry open a stubborn can lid.
That is not surprising given what the Onyx is designed to do. Its thin replaceable blade is intended for cutting, not for turning the knife into a miniature pry bar.
That distinction matters for buyer fit. Packages, cord, food, fishing line, and similar slicing jobs suit the design. Prying, twisting, batoning, and other jobs that put significant sideways force on the blade call for a more substantial knife.
Having spare blades available does not make abusing one a good idea.
Carry works like a conventional folder
Outside the replaceable-blade mechanism, the Onyx keeps its controls simple.
Outdoor Edge equips it with an ambidextrous thumb opener and a stainless steel pocket clip. The thumb studs make the knife accessible from either side, while the clip gives it the familiar pocket-carry arrangement expected from an EDC folder.
Independent testing found one minor drawback. Backpacker reported that the clip placement makes the Onyx ride relatively high in a pocket. Anyone who strongly prefers a discreet deep-carry setup should keep that in mind.
Cleaning also requires an extra step. Teters found that thoroughly cleaning the knife works best after removing the replaceable blade from its holder. That matters particularly if you are cutting food, fish, or anything else likely to leave residue around the blade assembly.
Who should buy the Outdoor Edge Onyx EDC?
The Onyx makes the most sense for someone who values a readily available sharp edge more than premium materials or traditional knife ownership.
It could work particularly well for campers, anglers, warehouse workers, DIY users, or anyone regularly cutting packaging, cardboard, cord, and other materials that gradually wear down an edge. Keeping replacement blades nearby means a dull knife does not have to become an immediate sharpening project.
It is less compelling if you enjoy maintaining a permanent blade, want premium blade steel, prefer substantial metal construction, or need a knife for hard-use outdoor jobs involving significant lateral force.
The Onyx is not trying to make its blade last forever. Its practical advantage is that it does not need to.
Price: $25.99
Where to Buy: Amazon
When the edge is no longer doing the job, you can swap in another one and keep cutting. For someone who sees a pocket knife primarily as a working tool, that may be more useful than owning a better blade that you keep putting off sharpening.
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