This assembly includes the Cable Attachment Clamp, O-ring sealed, greased, Control Cam, articulated compound Control Pawl with integrated Return Spring. It is an aluminum disk with a new self lubricated rubber lip seal as well as the Torque Fix Feature and a plastic Chain Fairing Fin. Please also consider whether you might want to add a new Ratchet Wheel or Cable Stop Bracket. If the crankset grabs and holds high gear seamlessly, your Ratchet Wheel is fine. If it skips or slips even with a new Control Plate Assembly then a new Ratchet Wheel would probably fix it. The exact contact angle between the control pawl and Ratchet Wheel determines the reliability of high gear. Harsh shifting impacts the contacting surfaces which are very small. The Control Pawl sees 26 times more impacts and the Ratchet Wheel teeth go bad one at a time. Brushing the contacting surfaces with a brass brush to clean them sometimes cures problems so try that first. Aluminum shavings from torquing the castellated BB flange against the Control Plate can stick to and foul the contacting surfaces of the Control Pawl and Ratchet Wheel. Also good to pedal backwards after first assembly to cause the Control Pawl to spatter and squash down all the grease between teeth of the Ratchet Wheel. That way the Control Cam can get fully seated to take the load when dropped into high gear. The planetary leverage gives the Control Pawl a huge mechanical advantage over the load through the gear teeth. More than four to one. So the gnashing of mechanisms during shifting occurs at less than one fourth of the stress. Therefore, a delicate mechanism can control a big load. Contact angle has to be right though.