The Endura 4 sets the standard as one of the best-selling folding knives ever made. All members of the Endura 4 family include a four-position clip, a high-strength back lock mechanism, and Trademark Round Hole.
It is the ideal pocket knife for Spyderco fans that find the Delica too small. The Endura 4 has a blade length of 9.6 cm. A difference of 2.3 cm compared to the Delica doesn't seem all that much, but this knife feels a lot stockier. The dimensions are combined perfectly with portability. Because of the handle of FRN (fiberglass reinforced nylon) the knife is still lightweight. The firmness is enhanced by the steel liners that have been used. These have been machined to prevent them from making the knife heavy.