Features: Removes & Installs Pressed on Alternator, Power Steering Pump and other Pulleys on Late GM, Ford & Chrysler Engines Complete with Adapters for Typical and Unique Style Pulleys Reversible Split Jaws for Easy Access to Pulley Flanges Works on Most Domestic Cars and Trucks Will not work on 3.3L and 3.5L Chrysler engines Suitable for: Fits Pulley shafts of 1-1/8", 1-1/4", 1-3/8", 1-5/8" Reversible split collect jaws grip pulley flange without pulley damage Threading Jack screw: 5/8"-18 GM 3.1 .