Diesel mechanics, this injector cup tool is essential for working on 60 series engines! It replaces the expensive OEM J-46904 and J-48824 tools at a fraction of the cost. Made from durable steel with silicone components that stand up to shop use. The tool handles screw-in stainless cups including part numbers 240-1039, 23538840, 240-1035, and several others. Proper injector cup installation is crucial - if the height isn't set correctly, you can have power issues, rough idling, and fuel mileage problems. This tool makes removal and installation precise and consistent every time. The corrosion-resistant construction means it'll last through years of use in your toolbox. You get both the J-46904 and J-48824 versions in the package, covering multiple cup types. The precision engineering ensures you don't damage those expensive injector cups during service. If you're dealing with injector timing problems or rebuilding diesel engines, this tool pays for itself quickly. Much better than trying to improvise with makeshift tools that can cause damage. The quality feels solid in your hands - definitely professional grade. Whether you're a shop mechanic or serious DIY diesel enthusiast, this tool makes injector service so much easier and more reliable. Definitely a must-have for anyone working on diesel injection systems regularly.