Tool is required when installing BMW self adjusting type clutches. Many newer BMW and Audi/VW models come with a self adjusting clutch. This type clutch has a black shipping plate locking the pressure plate fingers until the pressure plate has been aligned and bolted into place to spec. Any removing of the shipping plate before then will render the clutch plate useless and voids the warranty. The proper tool must be used to install this style clutch and are usually available under tool number ct1011 or ct1012.