TruGlo created the original TFO day / night sight, then made it virtually indestructible with hermetically-sealed TFX sights. Now, TruGlo is taking TFX technology to the next level for professionals and shooters who demand maximum performance from their handguns-providing ultimate reliability, accuracy, and brightness no matter how tough things get. Features: Contrasting colored front sight ring for even faster focus Black Retention Rings improve front sight acquisition and reduce glare Quick and accurate U-notch Design Angled rear sight edge for emergency one-hand operation All features of the popular TFX Handgun sights Built to be tough Fortress finish to handle just about anything Hermetically sealed TFX Capsule provides maximum protection of Tritium and Fiber-Optic elements from oils, chemicals, and cleaning solvents.