1. Designed for most common rail CDI injectors to remove the copper gasket that seals the bottom of the injector.2. Suitable for most vehicles using Bosch CDI fuel injection.3. Convenient thread and flare design, with the help of this special tool, the copper gasket can be quickly and effectively removed and installed on the diesel injector.4. 230mm long stroke and 7mm inner hole for copper gasket. Suitable for deep seat injectors.5. Material: 45 steel