The clip-on setting glasses are ideal for diamond setting and repair work.  All optics are ISO and CE certified. These lightweight glasses weigh five ounces and are available in two powers: 2.5X and 3.0X. They're offered in various working distances and allow the user to use their existing glasses if need be. Simply clip the optics to your frame of choice, use the center knob to adjust the optics for your optimum viewing. See the clip-on setting glasses and more great tools at Stuller.com/tools.