The Trijicon AC50014 DI Night Sight Retainer Replacement Pack Yellow from Trijicon is designed for shooters who want daylight brightness and a constant aiming point, pairing innovative, dual illuminated DI Night Sights with an industry-first interchangeable fiber that lets you field replace the fiber and tailor your sight picture on the fly. This patent-pending design not only provides the ability to swap fibers in the field but also enables you to mix and match several fiber and ring retainer colors to configure a personalized aiming solution that suits different lighting conditions and personal preferences. The kit includes 2 yellow DI Retainers and a T10 Torque L-Key, giving you the tools to install and adjust quickly for reliable performance in handgun applications where fast, precise alignment matters most. Designed for Handgun Parts and Handgun Sights, the system maintains a clear, bright aiming point while preserving the integrity of the original sighting plane, making it ideal for duty rigs, personal defense pistols, or precision range work where daylight brightness and consistency are paramount.