Provide reliable accuracy for your pistol with the Truglo TFO Brite-Site Fiber-Optic Pistol Sights, which utilize TFO technology to provide great transition through almost any light conditions. Made of CNC-machined steel, these sights glow in the dark without the use of batteries and can fit most standard holsters. Designed to fit GLOCK 42 and 43 handguns.