The Lisle Harmonic Balancer Installer Kit, No. 53790, is designed to install harmonic balancers or drive pulleys that are pressed on the crankshaft. The kit includes driving screw, thrust bearing, and 13 threaded adapters necessary to work on a wide range of domestic and some import harmonic balancers. The set features five long adapters for use on Dodge Hemi, generation III and IV GM motors, and some Chrysler. The 1.75" spacer allows the tool to work more effectively on deep harmonic balancers.