Fusion Fiber Optic Florescent Green 2 dot rear Sight for the mil spec, 70/80/90 series, A-1 1911 Colt style pistols & Clones with standard mil spec rear dovetail cut. Made from CNC machined Bar Stock, No MIM. This rear sight has a retaining screw to hole securely in place in the dovetail. The rods are installed on the rear sight. Also, INCLUDES retaining screw and wrench. The fiber optic rod is easily installed by melting ends with a match or gluing. Top Quality Professionally made sight.