1. Neoprene shock absorber - prevents link pin breakage and increases the life of the solenoid.
2. Hardened steel lever and spring gland reduces wear at the pins and all other points of contact.
3. Cast iron wheel - The physical properties of the iron minimize the tendency of the wheel to deposit metal particles in the lining which could result in serious scoring of vehicle. http://www.excelclutchbrake.com