Harmonic Balancer Puller with Adjustable 3-Jaw Puller Kit, Forcing Screw Fits a 3/8" Square Drive and 4 Forcing Rods for Removing Harmonic Dampers & Balancers. Wide Application - Harmonic Balancer Puller with Adjustable 3-Jaw Puller Kit works on a wide range of GM, Chrysler, Mitsubishi, Cadillac, Dodge, Jeep, SUV, Vans and Pickup engines - especially LS GM engines.