This clutch alignment tool is used to perfectly center the clutch disc under the pressure plate, which is located under the flywheel. This tool makes it much easier to align the splines in the clutch plate with the pilot bearing hole in the flywheel.Using this tool to align your clutch will prevent the plate from becoming distorted, which will prevent the clutch from coming loose or slipping. A tool is also included to help you retighten the coupling. The set meets the highest standards, is very sturdy and suitable for professional use. This tool comes in a blow molded case for easy portability and storage.