Troy Bilt External Snap Ring part# 1185649 is used on lawn tractor deck lift assemblies. It also has applications in gear cases on lawn tractor decks. Some models that use this part are here listed; 13034, 13035, 13036, 13037, 13039, 13040, 13053, 13078, 13079, 14000, 14001, 14023, 14024, 34036, and 34037. There are doubtless other applications for this part so, please reference your owners manual when possible. Sorry only one of these in stock at this time.