Truglo's TFO Sights provide a bright and reliable sight picture. It combines Truglo's Tritium and Fiber-optic technologies for a fast and accurate shot. The TFO has unbelievable transition through all light conditions, glows in the dark, and requires no batteries. Constructed of CNC-machined steel with a snag-resistant design the concealed fiber cannot be seen by the target. This model is compatible with 1911 Government-style handguns with existing fixed Novak LoMount dovetail cut slides.