They created the original TFO(R) day / night sight, then made it virtually indestructible with their hermetically-sealed TFX(TM) sights. Now, they are taking TFX(TM) 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 focusQuick and accurate U-notch DesignAngled rear sight edge for emergency one-hand operation