JL-7.5M Metal 7.5x Jewelers Eye socket Loupe also known as Watchmakers loupe, this model has an aluminium body and a 3/4 inch 7.5x lens which is considered medium high strength. This hands free eye socket loupe allows a jeweler's hands to be free to handle loose gems or watch parts and has a metal body for heavy use and durability. Comes with a storage case.