Everything we sell has a money back guarantee! If, within 45 days of receiving your CraftOptics you find you are not happy with the product, we will fix it or you can return it for a full refund, even if we install your custom prescription. If you need more time, simply let us know. Our goal is for you to have a product that works well for you, period. CraftOptics has a lifetime warranty on the telescopes and hinge, and a 3-year warranty on all other products and components.