The M9R 2.0lt diesel engine, as used by Nissan, Renault and Opel ( Vauxhall ), has deep seated injectors that are often difficult to remove. The tool works in the same way as the original manufacturers tool using a small but robust threaded puller design. The kit includes 2 force screws with different threads, allowing the kit to work with both the Piezo and solenoid style injectors used on these engines. Note: these injectors can be very tight and therefore require significant lubrication with a release agent to get them to move. Where possible run the engine up to temperature before attempting removal of injectors.