Designed for use on heavy-duty single two-plate and push/pull or manual and self-adjust clutchesShafts are constructed of lightweight fiberglass-reinforced nylon that won't hang up in clutch disc splinesRugged and will easily support the weight of heavy pressure plates1-3/4" outside diameter1" pilotThese 10-spline clutch alignment shafts are designed for use on heavy-duty single two-plate push/pull manual and self-adjust clutches. The shafts are constructed of lightweight fiberglass-reinforced nylon that won't hang up in clutch disc splines. Yet they're rugged and will easily support the weight of heavy pressure plates.