This is a twelve pack of DuBro 4-40 12" Rod with Spring Steel Kwik-Link. Complete assembly for any control linkage. Allows easy removal for on-the-field adjustments. Features 12" long .072 diameter (#306 - .093 diameter) rod with 3/4" 2-56 (#306 - 4-40) thread one end and Spring Steel Kwik Link and Spring Keeper.