This comprehensive tool set is suitable for a wide range of diesel vehicles, either commercial or occasional use. The whole set is designed to clean and decarbonise injector seats when changing injectors, avoiding blow back due to poorly seated injectors as well.The five various cutters contained are available for nearly all diesel cars. They can be used for re-cutting injector seats when reconditioning diesel engines or replacing the injectors. And they can also help to keep the diesel injector seat in order for the new or reconditioned injector to be fitted correctly.All the tools are manufactured from high quality materials, which provides easy clean work.set includes the following:1 x 15mm x 19mm flat reamer – for universal injectors / applications1 x 17mm x 17mm flat reamer – for Delphi / Bosch injectors (BMW / PSA / Renault / Ford)1 x 17mm x 19mm flat reamer – for Bosch injectors (Mercedes-Benz CDI)1 x 17mm x 17mm angled reamer – for Mercedes Benz CDI1 x 17mm x 21mm angled reamer – for Fiat / Iveco1 x T handle for easy application1 x pilot post1 x hexkey The whole set comes in a blow moulded carry case for easy transportation.