The Vision-Luxo LFG028216 LFM LED Round Magnifier, 3 Diopter Lens, 30 in. Internal Spring Arm, 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 LFG028216 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 3-diopter primary lens.