The Edroy Magnifocuser has been a staple since 1937 - yes that's a long time. The reason is simple - it uses a proven design that has stood the test of time. The only recent change has been to the color, adding black just makes this old-timer look a little bit kool. Still made in the USA, lens from New Hampshire and the rest from New York.
Here's the way to choose your Magni-Focuser. This is a fixed focus so you have a decision to make. Most people like dentists or model makers, beauticians for scientists need a specific working distance. If that's the case, then once you know the working distance you require that will determine the magnification. On the other hand, if you need a specific magnification such as a jeweler, stamp collector, or quality control inspector and you require the maximum of 3.5X or even something less then that is what will determine the working distance.
Safety glasses? Why would you need them? Because you are working closely and the Magni-Focuser offers some protection but the safety glasses close the gap. Why take a chance when the glasses are FREE.
Fits over glasses
Binocular flip-up magnifier w/ interchangeable lens units