Harmonic Balancer Puller/Installer Set For easy removal of most harmonic balancers and drive pulleys which are press-fitted onto the crankshaft. A bearing-centered circular 2/3-way puller flange and an assortment of metric and fractional bolts and adapters provide wide coverage. A heavy-duty, 3/4 dia. forcing screw is internally threaded to fit the eight adapters to install harmonic balancers. Adapter sizes included: M16 x 2.0, M14 x 1.5, M12 x 1.5, 3/4-16, 5/8-18, 9/16-18, 1/2-20 and 7/16-20. A blow-molded plastic storage case keeps set contents organized and protected from loss. No. 4531 ñ Harmonic balancer puller/installer set.