Distinguished by its skeletonized stainless steel liners and injection-molded fiberglass reinforced nylon handles Slim, highly refined blade grind creates incredible edge geometry and a distal taper that reduce friction for superior cutting performance Secure, non-slip grip and a four position hourglass pocket clip that supports left or right side tip up or tip down carry The stainless-steel-handled Endura 4 combines all the proven features and benefits of this iconic design with the heft and increased strength of a stainless handle. Its blade is hollow-ground from premium VG-10 stainless steel and proudly features Spydercos Trademark Round Hole for quick, reliable one-handed opening. Available in PlainEdge, SpyderEdge, and CombinationEdge configurations, the blade is supported by a sturdy back lock mechanism that locks it securely open when in use. Its satin-finished handle is chamfered at the edges for added comfort and includes four sets of mounting holes for the hourglass clip to support left or right-side tip-up or tip-down carry.