Product details:
This fluorescent lamp magnifier has an internal spring and tension knob to keep arm in desired position. Clamp-On 17115LG has a full 360 arm sweep. Die-Cast metal shade houses the primary lens. Accepts auxiliary lenses for higher magnification (order separately). Magnifiers operate on 120 VAC, 60 Hz. What's included: white 22-watt circular fluorescent tube and 6-ft power cord with three-prong plug. Precision-balanced arms maintain desired position.