Spyderco YoJumbo Knife Cobalt Blue G10, Satin SPY27 by Michael Janich (C253GPCBL)
- YoJumbo Cobalt Blue G10, Satin—designed by Michael Janich, an expert and trainer in the field of self-defense. The SPY27 steel blade and ergonomic G10 composite handle complement the natural curves of the hand.
0,00 €Spyderco YoJumbo Cobalt Blue G10, Satin Crucible CPM SPY27 by Michael Janich – a full-size folding knife with a Wharncliffe blade
The Spyderco YoJumbo C253GPCBL is a full-size folding knife designed by Michael Janich. The model is an enlarged interpretation of the Yojimbo 2 design and combines a Wharncliffe blade, Crucible CPM SPY27 steel, and a cobalt blue G10 handle.
The YoJumbo features a Thumb Hole opening mechanism, a Compression Lock, and a four-position clip that allows it to be carried on the right or left side, in either a tip-up or tip-down configuration. Skeletonized steel liners, an open spine, and thickly textured G10 peel-ply grips create a sturdy construction suited for larger hands.
Crucible CPM SPY27 – steel developed for Spyderco
The blade is made of Crucible CPM SPY27 powder steel. This is a cobalt-enriched powder steel developed specifically for Spyderco knives. It combines good cutting performance, corrosion resistance, and practical sharpenability. After use, it’s a good idea to clean the blade and dry it thoroughly.
Wharncliffe, Hollow Grind, and Satin
The Wharncliffe profile is characterized by a long, nearly straight cutting edge and a precise tip. The deep hollow grind facilitates aggressive penetration of the blade into the material, while the satin finish gives the blade a clean, functional look.
Cobalt Blue G10 and Compression Lock
The handle is made of cobalt blue G10 with a peel-ply texture that improves grip during use. Skeletonized steel liners reinforce the construction without adding excessive weight. The Compression Lock stabilizes the blade when open and allows the mechanism to be released from the back of the handle.
Key Features at a Glance
- Designed by Michael Janich — an enlarged design based on the Yojimbo 2 concept.
- Crucible CPM SPY27 — powder steel developed for Spyderco.
- Wharncliffe — long cutting edge and precision tip.
- Hollow Grind — deep hollow grind for efficient cutting.
- Satin — satin finish on the blade.
- Cobalt Blue G10 — textured peel-ply handle.
- Compression Lock — a strong lock operated from the back of the knife.
- Four-position clip — right/left and tip-up/tip-down configurations.
Technical Data
| Product Number | C253GPCBL |
| Product Name | Spyderco YoJumbo Cobalt Blue G10, Satin Crucible CPM SPY27 by Michael Janich |
| Overall length | 236 mm / 9.29" |
| Blade length | 101 mm / 3.98“ |
| Blade Thickness | 3.7 mm / 0.145” |
| Handle Length | 136 mm / 5.37“ |
| Handle thickness | 11.4 mm / 0.45” |
| Weight | 150 g / 5.3 oz |
| Blade Material | Crucible CPM SPY27 |
| Blade Hardness (HRC) | N/A |
| Blade Grind | Hollow Grind |
| Blade Finish | Satin |
| Handle material | G10 |
| Handle finish color | Cobalt Blue, peel-ply texture |
| Backspacer material | Stainless Steel (spacer sleeves) |
| Backspacer color | Gray |
| Clip | Right / Left, tip-up / tip-down |
| Clip material | Stainless Steel |
| Pivot pin | Phosphor bronze washers |
| Lock | Compression Lock |
| Opening mechanism | Thumb Hole |
| Additional accessories | None |
| Designer | Michael Janich |
| Brand | Spyderco |
| Manufacturer | Spyderco, Inc. |
| Country of Origin | USA |
Frequently Asked Questions
How do I care for and sharpen Crucible CPM SPY27 steel?
After use, clean the blade and dry it thoroughly. For regular sharpening of CPM SPY27, diamond stones, high-quality ceramic stones, or a sharpening guide system work well.
How does the Compression Lock work?
The Compression Lock uses a spring-loaded locking mechanism located at the back of the Handle. When opened, it stabilizes the blade, and releasing it does not require placing your fingers in the path of the folding blade.
What is the Wharncliffe blade suitable for?
The Wharncliffe blade works well for controlled cutting of cardboard, tape, cord, and other utility materials. The long cutting edge makes it easy to guide the blade, and the precise tip supports accurate work.
What does the peel-ply texture on the G10 handle offer?
The peel-ply texture increases grip and helps maintain a stable hold. Its distinct surface complements the full-size, utility-oriented nature of the YoJumbo model.
How can the clip be positioned on the Spyderco YoJumbo?
The clip can be mounted on the right or left side of the handle, in both tip-up and tip-down orientations. This allows you to customize how you carry the knife to suit your preferences.
Prepared by: Specialists at Sharg® company – Your expert in EDC and cutting tools
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