This magnification set contains four lenses and a spectacle clip in one hard-shell storage black box. With these lenses you can always be assured you'll have the right magnification for all your projects while you keep both hands free for the job at hand. Attaches to most spectacles for hands-free detailed work. Flip the lens back for normal viewing. Includes four lenses: 1.7x / 2.0x / 2.5x / 3.0x magnification.