Glowing bright both day and night, TFX sights are always ready. TFX takes Truglo 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 discriminant shooters. Hermetically sealed Patented TFX Capsule provides maximum protection of Trituium and Fiber-Optic elements from oils, chemicals, and cleaning solvents. 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 Focus-Lock increased speed and accuracy Snag resistant design Fits standard holsters Assembled in the USA with Swiss Tritium