If durability is what you need, the SG-10 SureGrip magnifier is what youre looking for. Reasonably priced, it is equipped with a 2x glass lens, along with a 10x high power acrylic 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 10x high power acrylic spot lens is integrated into the SureGrip rubberized handle. Soft-padded, zippered case included.