Simply put, TruGlo manufactures bright ideas. When TFX PRO sights immediately took off and gained critical acclaim, we noticed that the world of Tritium night sights needed a similar upgrade. Starting with the brightness and durability of our original Tritium night sights, we added all of our PRO level features, now including an orange Focus Lock ring for increased front sight contrast. Features: Front sight focus lock ring for even faster focus Angled rear sight edge for emergency 1-hand operation Unmatched visibility in all shooting conditions 24/7 Compact design maintains factory sight radius Assembled in USA with quality Swiss Tritium for maximum brightness Glows-in-the-dark - no batteries or light exposure required Fortress finish nitride protective coating Fits standard holsters