Mid-Sized Muscle. Industrial-Grade Steel. Signature Spyderco Style.
The Spyderco LeafJumper K390 is a refined evolution of Sal Glesser’s RockJumper design, built for users who demand performance and ergonomics in a compact footprint. This elite variant features a leaf-shaped blade crafted from Böhler K390 tool steel—an industrial-grade alloy engineered for extreme wear resistance and edge retention.
Its full-flat grind and serrated edge deliver aggressive slicing power, while the injection-molded FRN handle in signature K390 blue offers lightweight strength and high-traction Bi-Directional Texturing. The lockback mechanism ensures secure lockup, and the four-position stainless steel clip provides fully ambidextrous carry. Compact, capable, and unmistakably Spyderco.

Product Dimensions

• Overall Length: 7.51" (191 mm)
• Closed Length: 4.43" (113 mm)
• Blade Length: 3.09" (78 mm)
• Cutting Edge: 2.87" (73 mm)
• Blade Thickness: 0.118" (3.0 mm)
• Weight: 3.00 oz. (85 g)

Features

• Blade Material: Böhler K390 Tool Steel – Exceptional edge retention and wear resistance for demanding use
• Blade Style: Leaf-Shaped – Versatile profile for slicing and utility tasks
• Blade Grind: Full Flat – Efficient geometry for smooth cutting
• Blade Finish: Satin – Clean, low-glare finish
• Blade Edge: Serrated – Aggressive cutting power for fibrous materials
• Locking Mechanism: Lockback – Secure and ambidextrous with consistent lockup
• Handle Material: FRN (Fiberglass-Reinforced Nylon) – Lightweight, durable, and textured for grip
• Handle Color: Blue – Signature hue of Spyderco’s K390 series
• Pocket Clip: Stainless Steel – Four-position (tip-up/down, left/right carry)
• Designer: Sal Glesser – Spyderco founder and visionary
• Intended Use: Everyday Carry, Outdoor, Utility
• Made in: Japan