Cerametallic buttons bonded to a steel disc giving improved heat dissipation. A cerametallic clutch assembly is primarily used in rally/off-road and hill climb applications, where more clutch slip is required in order to modulate the drive. The advantages include resistance to high energy input (i.e. long slip), smoother engagement and less prone to judder over sintered drive plates. Spline: 24mm x 21T Typical application: Renault and Toyota Thickness (new): 7.08mm Minimum thickness: 6.29mm