[Solid material]-Made of solid zinc alloy material, black paint. Very durable and not easily damaged. This 30x magnifier has a 0.98 inch diameter lens, 3 white lights and 3 violet ultraviolet rays. This little magnifying glass will be a good helper at work. [Hands-free desktop magnifier]-The focal length is fixed to the clearest, without any adjustment. Just place the magnifying glass anywhere on the table and place the object in the middle of the scale. Then you can see the clear details of the project, and you can move it as needed. The base of the scaling can also be used to measure the size of the project. [Wide scope of application]-The diameter of the lens is 0.98 inches, and the magnification is 30 times. It is a professional work magnifying glass, very suitable for printing, handicrafts, watch repair, reading coins, jewelry, stamps, etc. [Easy to turn on/off]-Just press the soft silicone button to turn on the 3 white lights for regular magnification observation, and press the 3 UV lights again to use the currency detector magnifier. Press the third time to turn off the lights. [Soft Leather Case]-The magnifying glass is small in size (2.36 x 2.05 x 2.01 inches) and light in weight (5.82 ounces). It is also equipped with a soft artificial leather case to protect the lens, which is very convenient to carry and store anywhere.