Hydra OTF Knife – M390 Steel, Aerospace Aluminum Handle, Button Lock with Safety

Inspired by Legend. Built for Collectors.

The Hydra takes its name from the nine-headed serpent of Greek mythology — a creature of relentless resilience. Originally designed by the founder of Heretic Knives (son of Microtech’s Anthony Marfione), the Hydra single-action OTF series quickly became a modern classic, celebrated for its aggressive aesthetics, premium materials, and unmatched playability.

Specifications

• Overall Length: 22.9 cm
• Blade Length: 8.8 cm
• Blade Width: 1.98 cm
• Blade Thickness: 0.40 cm
• Blade Steel: M390 Super Steel
• Handle Material: Aerospace Aluminum (Space Aluminum)
• Lock Type: Single-Action OTF – Button Lock with Patented Teardrop Safety Cap
• Net Weight: 145 g

Signature Features

• Aggressive spine serrations — a hallmark of the Hydra design, delivering superior piercing and cutting performance
• Patented rotating teardrop safety button cover — must be rotated before the firing button can be pressed, adding an extra layer of security unique to this series
• Ergonomic handle curves with anti-slip grooves and precision chamfered edges for confident, controlled grip
• Pocket clip included; select versions feature a lanyard hole for EDC carry
• Deploy via front button; retract by pressing button while pulling the tail lever, then push tail back to lock

Included Accessories

• Nylon carry sheath
• User manual
• Premium gift box packaging
• Disassembly tool

Whether you’re drawn to its mythology-inspired design, its M390 blade steel, or its one-of-a-kind safety mechanism — the Hydra is a statement piece that rewards both the collector and the everyday carrier.