Benchmade Full Immunity 290BK Folding Knife
The Benchmade Full Immunity 290BK is a compact, premium EDC folder that carries a 2.49" Cobalt Black Cerakote CPM-M4 Wharncliffe blade in a full-size hand feel. Made in the USA at Benchmade's Oregon City, Oregon factory, the 290BK pairs hard-use CPM-M4 tool steel with lightweight Crater Blue anodized billet aluminum scales and Benchmade's smooth, ambidextrous AXIS lock, delivering a sub-2.5" blade that stays friendly to many carry rules while cutting well above its size. An included lanyard speeds retrieval from the pocket for one-hand manual deployment.
People shopping this size class usually search it as a wharncliffe pocket knife, a sub-2.5" EDC folding knife, or a CPM-M4 pocket knife — the Full Immunity 290BK is Benchmade's answer to all three.
Specifications
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Model: Full Immunity (290BK)
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Blade Steel: CPM-M4 tool steel, 58–60 HRC
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Blade Length: 2.49"
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Blade Style: Wharncliffe, Cobalt Black Cerakote finish, plain edge
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Action: Manual, dual thumb studs, AXIS lock
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Handle: Crater Blue anodized billet aluminum over skeletonized steel liners
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Carry: Reversible tip-up pocket clip, lanyard included
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Weight: 2.37 oz
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Origin: Made in USA, Oregon City, Oregon
Frequently Asked Questions
What blade steel does the Benchmade Full Immunity 290BK use?
The Benchmade Full Immunity 290BK uses CPM-M4, a high-carbon, high-vanadium tool steel prized for outstanding edge retention and toughness. It takes and holds a keen edge exceptionally well for hard EDC cutting.
How do I care for the CPM-M4 blade on the Benchmade Full Immunity 290BK?
CPM-M4 is a non-stainless tool steel, so the Benchmade Full Immunity 290BK blade can develop surface rust or patina if neglected. Keep it clean and dry, wipe it down after use, and apply a light coat of oil for storage. The Cobalt Black Cerakote coating on the 290BK adds protection, but the cutting edge still needs routine care.
What is a Wharncliffe blade, and how does it help on the 290BK?
A Wharncliffe blade has a straight cutting edge and a spine that curves down to meet the tip. On the Benchmade Full Immunity 290BK, this shape gives precise tip control and a full-length edge that excels at push cuts, detail work, and slicing on a flat surface.
How do you close the AXIS lock on the Benchmade Full Immunity 290BK?
Pull the AXIS bar rearward with your thumb and forefinger, swing the blade closed, then release. The AXIS lock on the Benchmade Full Immunity 290BK is fully ambidextrous and lets you close the knife without ever putting a finger in the blade path.
Does Benchmade sharpen the Full Immunity 290BK for free?
Yes. The Benchmade Full Immunity 290BK is covered by Benchmade's LifeSharp service, which provides free lifetime sharpening and factory reconditioning for the life of the knife.
Where is the Benchmade Full Immunity 290BK made?
The Benchmade Full Immunity 290BK is designed and made in the USA at Benchmade's Oregon City, Oregon factory.
Where can I buy the Benchmade Full Immunity 290BK?
You can buy the Benchmade Full Immunity 290BK at Going Gear, an authorized Benchmade dealer, so your knife is backed by the full Benchmade warranty and LifeSharp service.
