【Flip-Up Loupe Glasses】Improved Materials and Design for Flip-Up Section: The lens movement section is designed with screws to secure the hinge. The plastic connection parts use high-quality PC material, so the cover will not loosen no matter how many times it is flipped up! 【Easy-to-See 1.6x Magnification】We have adopted 1.6x magnification lenses, pursuing a wide field of view and ease of viewing without straining the eyes. ★The focal length of the 1.6x loupe glasses is 28-42cm (there are individual differences in how things appear and focal length). Please adjust the position where you can see the glasses-type loupe by moving it away. Please use it by focusing while bringing the hands you are working with, text, or other things you want to see closer to the lens. ★We use high-quality optical resin lenses with little distortion, making them less tiring on the eyes even after long hours of use. 38-9-20