Comes with Confluence Rudder Sheaves! A replacement central pivot knob and disc spacers for rudders on modern Confluence brand kayaks, such as Dagger, Perception and Wilderness Systems. The axle is the part that the rudder blade rotates on. The sheaves, (aka spacer plates or pulleys) are the parts that guide the rope on each side of the rudder blade. The modern 2021 version of the Rudder Axle Kit comes with instructions, a two part axle, a screw and 2 of the Confluence Rudder Sheaves. Install is fairly simple. Important Tip! Do not over tighten screw!