We SHENGLI padlock has established in 1993.We own modernized industrial workshops cover more than 35000 square meters,more than 400 emplyee and over 50 skilled technicians.We are one of the best manufacturer in the same industry with our advanced lock equipments and scientific management system.We have passws the IOS 9001-2008 quality system in 2009,and own the import &export rights.Also we produce sliding gate wheel ourselves and sell all over the world.If you have any interest,pls contact with me.