A flywheel locking tool for the Citroen 2CV is a specialized instrument designed to hold the flywheel in place during maintenance or repairs. This tool prevents the flywheel from rotating, which is crucial when performing tasks like clutch replacement or ignition timing adjustments. Typically made of strong metal, the tool is designed to easily attach to the engine block. It provides precision and safety while working on the engine and is a useful piece of equipment for both DIY enthusiasts and professional mechanics.