Spyderco Endura® 4 FRN K390In 1990 Spyderco shook things up by introducing two knives, the Delica and Endura. First of their kind on the market, both folders opened up the knife market to lightweight performance, one hand open pocketknives that just about everyone could afford. They settled as our top two bestsellers and their improvement hasn't slowed since. We've always taken great pride in our efforts to push the envelope of performance by offering exotic blade steels in our