The Discovery Crafts DHD 10 Head Magnifier is an optical magnifier for jewellery design and watchmaking. It attaches to the head with a convenient, size-adjustable headband, offers four different magnifications and is equipped with low-light illumination. This is a great choice for professional work or a hobby that requires handling small objects. The optical system contains three lenses: two rectangular lenses (both mounted one behind the other) and a circular lens with a flip-up design. The lenses can be combined with each other, allowing different magnifications. The optical material is optical polymer glass, which provides a clear and high-contrast image without blurring or geometric distortion. It is a very durable material that is resistant to accidental damage. Batteries are required for illumination.