Truglo TG131S1 Fiber Optic Set, Handgun Fiber-optics for the BRIGHTEST AIMING POINTS even in low-light conditions TRI-DOT AIMING SYSTEM of contrasting front and rear colors CONCEALED FIBER cannot be seen by target; SNAG RESISTANT DESIGN fits standard holsters FORTRESS FINISH COATING provides a permanent protective coating for maximum protection MACHINED AND ASSEMBLED IN THE USA; Made of tough, CNC-machined steel