Application: This Fuel Injector Puller Tool is designed to remove pencil nozzles used in many agricultural and construction engines such as for Case, Caterpillar, GM, John Deere, Waukesha and White diesel engines. Professional Fuel Injector Nozzle Remover: 7121 fuel injector puller tool is a removal tool specially designed for pencil-type fuel injectors nozzles. Help you pull out fuel injectors nozzles easily, remove fuel injector nozzles easily. Nice Design: .