You will receive one harmonic damper/balancer/pulley installation tool that fits Buick engines with 3/4″-16 crankshaft bolts that may include 198, 215, 225, 231, 254, 264, 300, 340, 350, 322, 364, 400, 401, 425, 430, 455 depending on the crankshaft being used.

The tool works for internally balanced engines with harmonic dampers, externally balanced engines with harmonic balancers, and hubbed pulleys used on engines without a harmonic damper. The threaded rod is rated at 135,000 tensile strength making it slightly harder than grade 5 steel.

The threaded rod is rated at 135,000 tensile strength making it slightly harder than grade 5 steel. The tool is designed to be used with the zinc washer between the installer nut and factory thick washer (not included).