Ade Advanced Optics 2021TB 20x by 21 mm Triplet Professional Jewelers Loupe, Black with Leather Case;

Ade Advanced Optics triplet glass lens for excellent clarity lens diameter of 13/16 inch 2-3/8-inch Length open, 1-7/16-inch closed, 1 inch thick and 1 inch wide necklace or lanyard ring for convenience leather case with snap closure to hold Loupe securely excellent clarity of the triplet glass lens (three lenses in a single shell) is a top feature of this quality Loupe, but it also has features that will provide convenience and security. If you need a quality 10x Loupe for a reasonable price, this is it. If you've never used a Loupe of this power, you may wish to know that the viewing distance is very short between the Loupe and the eye as well as between the Loupe and the object viewed. The center of the Loupe is the viewing area. It is all metal, no plastic parts.