How to use: First, make sure your vehicle's engine is off and cooled down. Then, locate the injector that needs to be removed. Attach the injector puller to the injector firmly. Slowly turn the puller's handle to pull out the injector. Notice: Do not use excessive force during operation to avoid damage to the injector or other engine parts. Keep your hands away from moving parts. Maintenance: After each use, clean the puller with a dry cloth to remove dirt and debris. Store it in a dry place to prevent rust.