Trouble seeing your 6x leader and size 24 fly? Try this hat clip-on magnifier and make close work of threading smaller hook eyes and knot tying much easier. This magnifier attaches to the brim of your hat with a clip and/or pin and flips easily out of the way. The extra magnification gives you what is needed to thread even the finest tippets with ease. The Flip-Focal optical aid is convenient when you need it and flips up under the brim of your hat when not in use. It is also not a bad magnifier for fly tying. Comes with a choice of 2.5X or 3.5X magnification, weighs less than 2 oz. and comes with a soft carrying case. Made in USA.