The Deluxe flexible arm illuminated magnifier, Model L 104 DX offers several special features, making it the finest available illuminated magnifier, Special features: the lens is made of the finest quality optical glass giving crystal clear view with the object being seen in its true natural colours; this 4X area magnification lens has a large rectangular size [170 x 105 mm] specially designed for giving perfectly strain free vision with both eyes. This enables continuous viewing for long hours without any fatigue whatsoever; the entire spring balancing mechanism of the magnifier is built inside the magnifier`s body, thus providing some unique advantages: a] most pleasing form and aesthetics, b] this unbroken external surface can be provided with highly durable surface finish, thus ensuring that the unit retains its aesthetic appeal even after several years of heavy duty usage, and c] also, because of this enclosed construction this model is the ideal choice for use in highly corrosive or humid environment. This product`s enclosed construction is particularly amenable to electro static discharge [ESD] proofing, which is mandatory in certain sensitive applications such as in electronics and explosives industries; the product offers both shadows less as well as directional lighting modes. Although in general shadow less illumination is preferred - there are many applications [e.g., study of minute surface defects] where directional illumination is essential for highlighting defects and other features of interest; and since the lens is held in a slim [but tough] edge from the front side, the user does not lose eye-contact with the object under view when switching between direct and magnified view.