Ruper 5024 double hand lens, a loupe which provides both x 15 and x 8 magnification with 13 mm and 25 mm diameter viewing fields respectively. A robust stainless steel body houses the doublet optics (two pieces of glass for higher quality viewing) which work together to eliminate abrasions in viewing. These magnifiers are manufactured in Japan to a high specification and are well known throughout various industries and fields of study. As this is a double lens, it offers you the option to easily switch between different strengths of magnification, depending on what is being viewed, overall, an excellent magnifier suitable for a variety of users including geologists, gemologists, jewelers, watchmakers, antique dealers, entomologists and more.