A stainless Steel frame holds HatEyes securely to your cap/hat. This #7 lens = 2.75x with an approximate working distance of 5-7 inches.
HatEyes by MagEyes, Inc -
~ HatEyes is a Clip On Cap, Hat or Sun visor, stainless steel magnifier
~ Slide action for lens will allow its use on long brim caps (3"+)
~ Adjustable pivot tension
~ Release grip pressure on lens frame allows for easy change of lens magnification, as needed
~ Wear Bifocals? - included in an extra long link that you can easly change on the frame