The Vision-Luxo LFG028217 LFM LED Round Magnifier, 5 Diopter Lens, 30 in. Internal Spring Arm with Clamp Mount, Light Grey is a light-weight all-metal construction magnifier that features an LED light source and flexible internal spring-balanced arm. The LFG028217 is suitable for both professional and industrial applications and comes equipped with full circle, flicker-free illumination for shadow-free viewing. This model features a 5 in. glass lens with a 5-diopter primary lens.