Product Description

The YoJumbo is what happens when Michael Janich's legendary Yojimbo™ 2 design gets scaled up for bigger hands, longer reach, and the most demanding cutting tasks you'll put a folding Wharncliffe through. Larger by more than 20 percent than the Yojimbo 2, it isn't simply a bigger version — the ergonomics were reworked from scratch to match the new scale, and the result is one of the most purposeful large-format tactical folders Spyderco has ever produced.

This cobalt blue expression steps up the steel to CPM® SPY27® — Spyderco's proprietary cobalt-enriched particle metallurgy stainless steel developed with Crucible Industries. The cobalt addition does something no other element in the formula does: it multiplies the hardening effect of the other alloys, producing a blade that holds a working edge longer than VG-10, toughs out lateral stress better than many higher-carbon steels, and resists corrosion without extra maintenance. The 3.98" blade is deeply hollow-ground, which means it runs aggressively thin behind the edge — delivering the kind of slicing geometry you expect from a blade twice this price. The Trademark Round Hole™ keeps deployment fast and fully ambidextrous.

• Blade: 3.98" CPM® SPY27® deeply hollow-ground Wharncliffe, 0.145" thick, satin finish, PlainEdge — geometry optimized for precision slicing and controlled penetration
• Handle: Cobalt blue coarse peel-ply textured G-10 scales over open-backed skeletonized stainless steel liners — non-slip in wet conditions, reduced weight without sacrificing rigidity
• Deployment / Lock: Trademark Round Hole™ for ambidextrous one-handed opening; Compression Lock® — releases with a one-handed push, keeps fingers away from the closing blade path
• Carry: 5.3 oz | Four-position pocket clip configurable for left or right-side, tip-up or tip-down carry | Closed length 5.37" — substantial but designed for daily carry in a jacket or cargo pocket

Ideal for: Tactical folder enthusiasts who've graduated from the Yojimbo 2 and need a blade long enough for more demanding tasks without switching to a fixed blade; left-handed tactical carriers who require a true four-position clip without aftermarket modification; Michael Janich collectors building a complete CPM® SPY27® expression set.

Few tactical folders combine this level of blade geometry, American-made construction, and collector-grade steel in one package. Order the Spyderco YoJumbo C253GPCBL from Knifeworks — your authorized Spyderco dealer — with same or next business day shipping from Columbia, Louisiana. Call 888-225-9775 if you want to talk through the YoJumbo vs. Yojimbo 2 decision — our team carries both.