Adjustable Door Mount Telescoping Hooks - Self Haircut Mirror for Men. 3 way mirror basic principle and what advantages does it have over single-sided mirror? The three way mirror is a combination of three single mirrors through a rotary joint, two of which can be flipped 180 degrees, through the principle of reflection so that it can observe any position you want to see, so that you can easily observe the back of the head and its back. Great for guys too! Hang from any standard size door. Pull down to your height, open sides and easily see the sides and back of your head for personal grooming. Perfect Gift for Boys and Man Made from premium ABS material resistance for scratch, nice gift for for ladies, girls and also men. Perfect for shaving, brushing your teeth, flossing, exfoliating, makeup and more.