Harmonic Balancer Installer 5pcs Tool Set, Long Reach Crank Pulley Underdrive Pulley Damper Installation Tools for V8 and V6 Engines with 4 Adapters. 【Universal】Suitable for GM (Gen III/Gen IV), and fit for Ford systems requiring extra long installers, this kit services harmonic balancers, underdrive pulleys and recessed crank threads on these models.