This OTR clutch assembly ensures you are Ready for the Road Ahead , with exceptional lead-free ceramic friction. This product features a sealed and permanently oiled release bearing for longer life and less maintenance. With advanced ceramic material, this premium spring clutch delivers 10-15% more holding power versus carbotic. The cryogenically treated springs eliminate disc spring failures. This heavy duty spring clutch also boasts clad bushings that are crimped and pressed into the sleeve, which encourages extended bushing life for your semi truck. FleetPride is your First Click in Heavy Duty .