This harmonic damper pulley holding tool has been developed to aid in the removal and installation of the crank bolt on Gen III engines. These damper pulleys need a special tool to hold the pulley stationary for the center bolt to be removed. The bolt is extremely tight and without the SCH62800, removal is extremely difficult at best. In replacing the center bolt after installation of the pulley, factory specifications require 240 pounds of torque to seat the pulley properly. This tool allows the factory torque to be attained. This holding tool works with the following engines: 1997 and later Gen III 5.7 L V-8 Camaro, Corvette, Firebird, and Trans AM