Hands-Free™ Magnifiers allow two-handed examination of objects. They provide a sharp, crisp, distinct image with vivid enhancement of details. Some sizes provide battery-powered brilliant illumination for precision work (batteries supplied). Designed specifically for use in quality control, labs, food, electronics, manufacturing, and universities. White ruler markings in both inches and millimeters on the lower panel assist in making measurements. All-glass optics assure perfect focus with zero distortion. Magnifiers fold twice for compact storage. Replacement battery Cat. No. CON1111. Replacement bulb Cat. No. CON8014.