Spyderco C253GPCBL YoJumbo (CPM SPY27, Wharncliffe, Hollow, Blue G10, Compression Lock) Pocket Knife

The Spyderco YoJumbo Folding Pocket Knife, designed by Michael Janich, is an enlarged and refined evolution of the Yojimbo™ 2. Increased by more than 20% in size, it delivers improved ergonomics for a wider range of hand sizes while preserving the aggressive, performance-driven design language of the original. Built for tactical use and precision cutting, the YoJumbo focuses on control, strength, and rapid deployment.

At its core is a deeply hollow-ground Wharncliffe blade made from CPM® SPY27® steel, a proprietary cobalt-enriched particle metallurgy stainless steel exclusive to Spyderco. This advanced steel offers an excellent balance of toughness, edge retention, and corrosion resistance. The blade features a fully accessible Trademark Round Hole™, enabling fast, ambidextrous, one-handed opening for reliable deployment in any situation.

The handle is constructed with skeletonized stainless steel liners nested within coarse peel-ply textured G-10 scales, providing high strength and a secure grip under demanding conditions. The design is finished in Spyderco’s signature cobalt blue aesthetic for instant recognition. A robust Compression Lock mechanism ensures secure blade lockup while allowing smooth one-handed operation.

Spyderco C253GPCBL YoJumbo Key Features

• CPM® SPY27® blade steel — exclusive Spyderco alloy with excellent toughness and corrosion resistance
• Wharncliffe blade design — precise slicing and controlled cutting performance
• Deep hollow grind — enhanced slicing efficiency
• Trademark Round Hole™ — fast, ambidextrous one-handed opening
• Compression Lock — secure and reliable locking mechanism
• Skeletonized stainless steel liners — strength with reduced weight
• G-10 handle with peel-ply texture — secure, high-traction grip
• Four-position pocket clip — fully ambidextrous carry options

Specifications

• Model: YoJumbo
• Designer: Michael Janich
• Overall Length: 9.29″ (236 mm)
• Closed Length: 5.37″ (136 mm)
• Blade Length: 3.98″ (101 mm)
• Edge Length: 3.98″ (101 mm)
• Blade Thickness: 0.145″ (3.7 mm)
• Blade Material: CPM® SPY27®
• Blade Grind: Hollow
• Blade Style: Wharncliffe
• Handle Material: G-10 with Stainless Steel Liners
• Lock Type: Compression Lock
• Pocket Clip: 4-Position (Ambi, Tip-Up/Tip-Down)
• Knife Weight: 5.3 oz (150 g)
• Origin: United States