MagEyes had in mind archers who need a little help seeing tiny objects up close when they made the HatEyes Flip Down Magnifier. Available in 1.6 or 2-power magnification, the HatEyes fit most any hat with a brim at least 3 inches long. Pull them down when you need them. Flip them up when you don't. • Fits most cap or hat brims at least 3" in length • Lens swings out of the way when not in use • Stainless steel construction • Optical quality acrylic lens - dual lenses have no distortion • Extra long link for Bifocals included • Made in the USA