Fuel injector service tools (predominantly targeting Common Rail diesel systems and Direct Injection gasoline engines) are specifically engineered for the safe extraction of fuel injectors that have become heavily seized due to baked-on carbon deposits and galvanic corrosion. Attempting to pry out a stuck injector with makeshift tools inevitably leads to shattering the expensive injector body or irreparably damaging the cylinder head. The assortment features heavy-duty slide hammers equipped with custom-threaded adapters for major injector brands (Bosch, Delphi, Denso), powerful hydraulic extraction kits for severely seized units, specialized seat cutters (reamers) to true-up and clean the injector seating surface inside the port, and expanding collet tools designed to blindly retrieve burnt copper sealing washers stuck at the bottom of the bore.