Spot Hogg Sights are milled from 6061 aircraft aluminum. They are so tough that Spot Hogg products are backed by a 100% guarantee. All of Spot Hogg sights are put through a rigorous inspection process, these state of the art sights are not only cosmetically clean, but they are mechanically sound. When you buy a Spot-Hogg Sight you are investing in the last sight you will ever need. You deserve the best for your bow and the best is what Spot-Hogg provides.