This set consists of 1 Clevis Pin, 1 Washer, and 1 Cotter Pin. This item is used either for attaching a Single Futon Roller to the futon frame, or—with a longer pin—to attach the seat and back of the futon frame to each other. The pin has a 2 5/16" usable length, measured from below the head of the pin to just before the hole for the clip.