The Calvan Tools 38800 Harmonic Balancer Installer is a versatile tool designed for the precise installation of harmonic balancers and drive pulleys. This kit includes 12 adapters in both standard and metric sizes, offering one of the broadest application coverages on the market. It ensures proper installation of pulleys on crankshafts, making it an essential tool for professionals. Compatible with the Calvan Tools 189 Harmonic Balancer Puller, this installer provides reliable performance for a variety of vehicles.