Lisle 53760 Harmonic Balancer Installer Kit (12 Adapters) Set includes driving screw, thrust bearing and 12 threaded adapters necessary to work on a wide range of domestic and some import harmonic balancers Four long adapters for use on Dodge Hemi, Generation III and IV GM motors, some Ford and some Chrysler The 1.75" spacer allows the tool to work more effectively on deep harmonic balancers