FEATURES: Fitment: Fits GM 6.6L Duramax Diesel, 2001 to present. Replacement: Similar to J-45910, replace 7222. Material: Made of high quality steel, solid and sturdy,black finish. Must have tool: Designed to removes injector sleeves for service and re-installs, helps diesel mechanic get their job done right. Easy to use: No need to remove any rocker arms or valve springs, just fully seat the tool in the injector. .