TFX Sights are always ready made from ultra-tough, chemical-resistant materials and providing a bright sight picture both day and night, helping you stay prepared for any scenario. TFX PRO takes it to the next level, offering a colored front focus ring for faster sight acquisition and improved accuracy. TFX PRO sights are designed for shooters who require the absolute best reliability, visibility, and accuracy. Product Features Fully protected TFO technology encapsulated in a virtually indestructible configuration Impervious to oils, chemicals, cleaning solvents and ultra-sonic cleaning processes Unmatched visibility in all shooting conditions 24/7 Utilizes quality Swiss tritium for maximum brightness Glows in the dark No batteries required Concealed fiber can not be seen by target FORTRESS FINISH provides a permanent protective coating for maximum protection High-Contrast Orange FOCUS LOCK Ring increases speed and accuracy All features of TRUGLO's popular TFX Handgun sights