This rugged bonded 6 puck ceramic disc was developed for the rigors of professional rally competition.  Unlike the metallic discs, the engagement is smoother because it can be slipped getting off the line.  This makes it a favorite for vintage road racing.  Unlike the Tilton metallic disc, the rally disc can be "slipped" without damaging the friction surfaces.  Getting out of an agricultural excursion causes no problem.  The Tilton Rally clutch takes a licking and keeps on ticking!