Features and Benefits: For easy removal of most harmonic balancers and drive pulleys which are pressed fitted onto the crank shaft A bearing-centered circular 2/3-way and an assortment of metric and fractional bolts and adapters provide wide coverage A heavy duty 3/4 in. diameter forcing screw is internally threaded to fit the eight adapters to install harmonic balancers A blow molded plastic storage case keeps set contents organized and protected from loss OTC Stinger harmonic balancer puller/installer sets save you time and frustration when you re installing and removing balancers. These sets allow you to drive pulleys that are press-fitted on the crankshaft. OTC includes a bearing-centered circular 2/3-way puller flange and an assortment of adapters that cover a wide range of applications. A storage case keeps the set contents organized and protected from loss.