Labo-med leave both hands free for working - Magnifier 2.5x 5D Frame Black Working Distance 180 mm * Comfortable working distance even with a high level of magnification * Ideal not just for work tasks but also for leisure and craft activities * enses easily interchangeable. - Lens clamp made from glass fibre reinforced plastic * Can also be used with monocular lenses which are available as an accessory see picture 4-5