The Harmonic Balancer Bolt Kit is used to secure the crankshaft damper pulley to the crankshaft. The crankshaft damper pulley is a heavy rotating mass that helps to absorb torsional vibrations from the crankshaft, which helps to reduce engine wear and noise. It consists of a washer and bolt.Attributes:• Keep the crankshaft damper pulley securely fastened• Help absorb shock loads from the engineApplications:The Harmonic Balancer Bolt Kit is used to keep the crankshaft damper pulley aligned with the drive belts.