Inspired by Sal Glesser's original RockJumper™ design, the Spyderco 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 a serrated 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. Its Bi-Directional Textured fiberglass-reinforced-nylon (FRN) handle is molded in the distinctive blue color reserved for Spyderco's elite K390 family of knives.