You count on your handgun to be reliable in any situation. Your sights should be held to the same standard—which is why TRUGLO TRITIUM-X™ sights are made from solid steel and treated with a nitride FORTRESS FINISH™ to handle just about anything. SWISS TRITIUM lamps provide a bright and constant glow in low light or even complete darkness. Tritium does not require any batteries or light exposure—it simply glows!