Fine tune your tackle accessories using the Flip Focal(R) Magnifying Lens. This lens magnifies to offer greater clarification for sharpening hooks, fly tying, attaching lures and terminal tackle. There's no need to change your glasses with a clip that allows you to wear the lens over your pre-existing pair. This saltwater-friendly magnifying lens comes with an optional pin and snap lock. FEATURES: Magnifying lens 2.50 and 3.50 magnification Magnifies to more easily sharpen materials Built for saltwater use Can clip on to existing glasses Optional pin and snap lock Model: FF250