Very popular, takes an ordinary lamp-light bulb, up to 60 watts (Bulb Not Included). Swivels and can be adjusted in all directions. 4'' lens and 2x power. You use this magnifier in so many ways: work bench, office, labs, reading, hobby work, and much more! They sell well in many places note:  a really good magnifier! There many uses include: jewelry, rock and coin collectors, leisure markets, dealer shows, hobby and craft stores, internet auctions, school and college book stores, office supply and book readers of all sorts, ect..

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