Generic 11 Pcs Laser Diesel Injector Seat Cutter Set Car Repair Tool Garage Auto The items you ordered will be shipped out in 1-2 business day from Los AngelesCA. And you will receive it in one week. Professional tool for commercial or occasional use. Suitable for a wide range of diesel vehicles. Set of 5 cutters for re-cutting injector seats when reconditioning diesel engines or replacing the injectors. Re - face the diesel injector seat in order for the new or reconditioned injector to be fitted correctly. Manufactured from high quality materials - SKD11 - provides easy clean work. This set is used to clean and decarbonise injector seats when changing injectors. It helps to avoid blow back due to poorly seated injectors. Various cutters are available for nearly all diesel cars. Injectors can be extremely difficult to remove, due to the build up of carbon deposits and the effects of corrosion. Once they have been removed, the injector seat is often in a condition that makes it almost impossible to successfully seat the injector (causing high risk of blow back - this is where the leaking of combustion gases from the cylinder via the injector seat). This can lead to various poor running and starting symptoms, excessive smoke, tar build up, noise and loss of compression.