Cutthroat single bevel COC, machined from a billet of tool steel and hardened to 55Rc, as hard as Bishops for less than half the price. No pins, screws, welds or rubber bands to fail. Check out the tests on Toutube, toughest one every time. Buy a KME broad head sharpened for $45 and you are set for life. Now you know what to do.