Glowing bright both day and night, TF sights are always ready. TFX takes our 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.The first and ONLY of it's kindFully protected TFO(R) technology encapsulated in a virtually indestructible configurationImpervious to oils, chemicals, cleaning solvents and ultra-sonic cleaning processesUnmatched visibility in all shooting conditions 24 / 7Utilizes quality Swiss tritium for maximum brightnessGlows in the darkNo batteries requiredConcealed fiber can not be seen by targetFORTRESS FINISH? provides a permanent protective coating for maximum protectionSnag resistant designFits standard holstersPatented