Fantastic little piece! The best we’ve ever seen. Brand-new, the Mirror SOS Type 644 is made by L’Optique Scientifique in Paris. Made of optical glass, it has a sighting hole in the center. Holding it close to your eye, you aim and manipulate it until you see a bright red spot on the target. Especially useful in situations of great distance. Complete with thumb handle, lanyard and instructions. 2” x 2”