If the font becomes too small, or if fine details are no longer recognizable in the hobby or at work, a magnifying glass or a reading aid is needed. Eschenbach magnifiers and reading aids are quality products with precise lens production for your sensitive eye. Precise watchmaker's magnifying glass made of flame-retardant plastic with ventilation hole against fogging, lens plano-convex, magnification 7.0 x, size 25 mm.