If durability is what you need, the Carson SureGrip magnifying glass is what youre looking for. Reasonably priced, it is equipped with a 2x magnifier with 11.5x, high power spot lens for close up inspection. The 90mm (3.5) glass magnifier is the perfect solution for those searching for a durable lens that will not scratch. The 11.5x spot lens is integrated in to the SureGrip rubberised handle and made of crystal clear glass. Soft-padded, zippered case included.