1. Clear Scale: With a scale, it's easy to calculate the number of weft threads in the fabric, i.e., the transverse threads of the fabric. 2. Easy Folding: The magnifier is foldable, easy to store and carry, and convenient to use. 3. With Light: Designed with a light, this magnifier can also be used in the dark, allowing you to clearly see the objects to be observed. 4. For Printing: Widely used in the printing process to determine the quality of the ink and adjust the color, i.e., four types of ink (cyan, magenta, yellow, and black) hit the same point to form the desired tone. 5. Wide Application: For quality control in the paper and printing industry to verify security features hidden in airline tickets and passports, and to observe and use small institutions such as small circuits in electronic applications. Item Type: Magnifier Material: Metal, Glass Lens Battery: 2 x LR927 Button Battery (Built-in) Total Size: Approx. 3.9x5x5.6cm/1.5x2x2.2in Top Width: Approx. 3.8cm/1.5in Lens Diameter: Approx. 2.8cm/1.1in Use: Magnifier 1 x Magnifier 1 x Leather Case 2 x Button Battery