The Special Damper Bolt is designed to securely fasten the crankshaft damper pulley to the crankshaft. The damper pulley helps to reduce vibration and noise in the engine, and the special bolt ensures that the pulley remains properly secured in place. The bolt and washer are made up of steel, the damper is made up of rubber.Attributes:• Withstands frequent use and mechanical stress without breaking or deforming• Manufactured to precise specifications and are built for durability and reliabilityApplications:The Special Damper Bolt is used to ensure that the damper pulley remains properly aligned with the crankshaft and to prevent the damper pulley from loosening or coming off.