Description- The set includes four 10x 21mm chrome loupe and four 10x&20x dual loupe The 10x power loupe has a focal distance of 1" (26mm) with 21mm dia lens size The dual loupe is 10x power with 18mm lens size and 20x power with 12mm lens size, the strong magnifications with a mid distance of 1/2" (13mm) Made of optical glass lens with chrome plated metal body; protected when not in use by the swing-out chrome plated metal cover Both loupes come in a protective plastic case Chrome plated metal body with glass lens It include a small loop to attach to a neck chain or key chain Good for identifying small marks on jewelry, watch making industry, specially for inspectingBrand new