Made from solid bar stock and hardened. Has .042 dia aperature(threaded with hood) and a non-threaded .046 dia aperature. The elevation wheel provides for 1/4 or 1/2 MOA. The windage is 1/2 MOA. New in the packaging. I have two for sale at $75.00 each shipped. These are super nice. Please IM me or e-mail if you are interested. I can provide a pic.