Inspired by Sal Glesser's original RockJumper design, the LeafJumper is a mid-sized, back lock folding knife with a wide, ergonomic handle and a versatile leaf-shaped blade. This elite expression of it supercharges the design with Böhler-Uddeholm's K390 MICROCLEAN blade steel. A state-of-the-art tool steel created to withstand the rigors of industrial cutting, blanking, and punching operations, K390 offers exceptional strength and edge retention when used in knife blades. The K390 LeafJumper is available in both PlainEdge and fully serrated SpyderEdge configurations. Its lightweight fiberglass-reinforced-nylon (FRN) handle is molded in the distinctive blue color reserved for Spyderco's elite K390 family of knives. The handle's construction includes nested, skeletonized stainless steel liners, a sturdy back lock mechanism, a high-traction Bi-Directional Texture pattern, and a fully configurable four-position pocket clip that supports all carry preferences. Founded in 1976, Spyderco is a leading innovator in high-performance knives, known for their signature round hole and ergonomic designs. Trusted by outdoor enthusiasts, first responders, and professionals, Spyderco uses advanced materials like CPM S30V and SPY27 steel to create durable, reliable tools. With a focus on precision and innovation, Spyderco continues to set the standard for quality in the knife industry.