Stanley 757040 - 6" Zinc Plated(2C) Chain BoltStanley is proud of its reputation for excellence. They are dedicated to continually testing, designing and improving their products to ensure quality and maximum function. Maintaining their standing of being the world"s best at what they do is important to them and what you expect from a name like Stanley. Stanley 757040 - 6" Zinc Plated(2C) Chain Bolt Features:; For use on cabinet, double screen, garage and industrial doors ; Can be used on doors opening in by reversing the square bolt ; Equipped with a strong hard-drawn wire spring which throws the bolt automatically when chain is released ; Full 24" long chain ; Includes surface and angle strikes ; Carded ; 75-7029: 3" bolt, Zinc plated ; 75-7031: 3" bolt, Satin Brass ; 75-7030: 4" bolt, Satin Brass ; 75-7033: 4" bolt, Zinc plated