Tritium/Fiber Optic (TFO) technology combines the self-illuminating properties of Tritium with the light-gathering capabilities of fiber optics to ensure fast sight acquisition in any light conditions from daylight to complete darkness. Precision-machined, steel body provides excellent strength to handle the rigors of combat or competition. Low-profile design prevents holster snagging. Fits factory dovetails; rear sight includes setscrew for extra-secure installation on slide. Sold in front/rear pairs. Mfg: Truglo