Spyderco Endura 4 Cobalt Blue FRN CPM SPY27 PlainEdge (C10PCBL)

The Spyderco Endura 4 is one of the most iconic folding knives in the industry, a best-seller since its introduction for everyday carry (EDC). The C10PCBL variant elevates this classic platform with Spyderco’s exclusive CPM SPY27 blade steel and a striking cobalt blue fiberglass-reinforced nylon (FRN) handle.

Key Features and Specifications

Blade: 3.8″ (97mm) full-flat-ground drop-point with PlainEdge and satin finish.

Steel: CPM SPY27 (particle metallurgy stainless, exclusive to Spyderco).

Handle: Cobalt blue FRN with Bi-Directional Texturing for superior grip.

Lock: Reliable back lock mechanism.

Opening: Signature round thumb hole for smooth, ambidextrous one-handed deployment.

Clip: Four-position hourglass pocket clip (tip-up/down, left/right carry).

Overall Length: 8.86″ (225mm) open.

Closed Length: 5″ (126mm).

Weight: Approximately 3.3 oz (94g) — incredibly lightweight for its size.

Origin: Made in Japan.

The cobalt blue handle color is a signature of Spyderco’s SPY27 family, instantly identifying it as part of this premium steel lineup.

About CPM SPY27 Steel

• Developed in collaboration with Crucible Industries, CPM SPY27 starts with the proven cobalt-enriched formula of VG-10 and enhances it with additions of niobium, nitrogen, higher carbon, molybdenum, and vanadium. The result is a super steel that offers:
• Excellent edge retention (comparable to or slightly below S30V/S35VN in user tests).
• Superior toughness and corrosion resistance.
• Remarkably easy sharpening — it responds exceptionally well to stropping and maintains a keen edge with minimal effort.
• Users often praise it as a “low-maintenance” EDC steel: sharp out of the box, holds a working edge through heavy use, and touches up quickly without needing advanced sharpening setups.

Why the Endura 4 Platform Excels

The Endura 4 has been refined over decades into a near-perfect lightweight folder. Its skeletonized stainless steel liners provide structure without adding weight, the Bi-Directional Texturing ensures a secure grip even in wet conditions, and the phosphor bronze washers deliver buttery-smooth action. The full-flat grind slices effortlessly, making it ideal for daily tasks from boxes to food prep.

This SPY27 version combines the legendary Endura ergonomics with modern steel performance, creating a versatile, durable, and eye-catching EDC knife that’s tough enough for demanding work yet light enough to forget it’s in your pocket.

Whether you’re a long-time Spyderco enthusiast or looking for an upgrade to your carry rotation, the C10PCBL Endura 4 in cobalt blue is a standout choice — blending tradition, innovation, and practical excellence.