Master Lock is the world's biggest manufacturer for padlock and portable security products. Master Lock provide a series of complete safely lock/mark products, as the security of a complete set of the padlock. These accessories of unique lock/mark series are innovative and application for a patent, including device which be locked up on the wire rope, gate valve, ball valve, circuit breakers, cover of plug and so on. There are options of individual or modular lock and mark sets or workstation, they are simple and easy to use and have high practical efficiency.