We created the original TFO day / night sight then made it virtually indestructible with our hermetically-sealed TFX sights. Now we are 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. - Contrasting colored front sight ring for even faster focus - Quick and accurate U-notch Design - Angled rear sight edge for emergency one-hand operation - All features of our popular TFX Handgun sights - Patented