Spyderco Endura 4 Lightweight Folding Knife

The Endura 4: A Lightweight Classic Reimagined

Spyderco's Endura 4 has earned its place as one of the most respected folding knives in the world. This lightweight version maintains all the virtues of the original while introducing CPM SPY27, a proprietary powder metallurgy steel developed in close cooperation with Crucible Industries.

CPM SPY27 Steel: Purpose-Built Performance

CPM SPY27 represents a significant advancement in blade steel technology. This American-made material takes the proven performance of cobalt-enriched VG-10 and enhances it with:

• Niobium and nitrogen for improved toughness
• Increased carbon, molybdenum, and vanadium for superior edge retention
• Exceptional corrosion resistance for reliable performance in any environment
• Easy sharpening for practical field maintenance

Design and Construction

The Endura 4 features a 3.8" drop point blade with a full-flat grind that delivers an ultra-keen edge. The satin finish resists glare and reflects the knife's purposeful design. A plain edge configuration provides reliable cutting performance without the maintenance demands of serrations.

The lightweight fiberglass-reinforced nylon (FRN) handle is injection molded in distinctive cobalt blue—a signature color of the SPY27 family. The back lock mechanism provides secure blade retention and reliable one-handed operation.

Specifications

• Blade Length: 3.8"
• Overall Length: 8.7"
• Blade Steel: CPM SPY27
• Handle Material: Cobalt Blue FRN
• Edge Type: Plain
• Locking Mechanism: Back Lock
• Manufactured in Japan

This is a knife built for serious users who demand performance, reliability, and the confidence that comes from carrying a tool engineered for real-world use.