In 1990, Spyderco introduced two knives, the Delica and the Endura, which pioneered the lightweight performance knife market—one-handed pocket knives that almost anyone could afford. They became the first two bestsellers, and their improvement hasn't slowed since. Now, we introduce the Endura 4 Lightweight, featuring a flat-bottom blade made of K390 stainless steel and an injection-molded Bi-Directional Textured™ handle in the signature blue color reserved for this family of high-performance cutting tools.

Produced by Böhler-Uddeholm, K390 MICROCLEAN® is a cutting-edge cold-work tool steel manufactured using particle metallurgy. Its advanced alloy blend was specifically developed to provide the extreme wear resistance and high compressive strength required for industrial cutting, blanking, and punching operations. Despite its toughness, its exceptionally fine and homogeneous microstructure also makes it easily machinable and heat-treatable. Together, these qualities make K390 an exceptional blade material for true steel connoisseurs.