Glowing bright both day and night, TFX sights are always ready. TFX takes their award-winning Tritium + Fiber-Optic technology even further with all the features our customers requested: compact snag-free design, longer sight radius, and amazingly durable construction built to handle just about anything. Illuminating elements are encased inside a virtually indestructible chemical and shock-resistant capsule and the CNC-machined steel is protected with a rust-proof FORTRESS FINISH. There is even a highly visible white ring surrounding the front fiber to make it even more visible, encouraging the eye to rapidly focus on the front sight for a fast and accurate sight picture. TFX sights will amaze even the most discriminating shooters. 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 or light exposure required Front sight FOCUS-LOCK for fast and accurate shooting Concealed fiber cannot be seen by target FORTRESS FINISH provides a permanent protective coating for maximum protection Snag resistant design / fits standard holsters Patented