Designed for shooters who want daylight brightness and a constant aiming point, the dual illuminated Trijicon DI Night Sights are equipped with an industry-first, interchangeable fiber. This patent pending design not only allows the ability to replace the fiber in the field, it allows the user to choose among several fiber and ring retainer colors to configure a personalized aiming solution. This kit includes 4 Green fiber replacements, 2 Black retainers and a T10 Torque L-Key.