The HT4 boasts a true 400 spine in a .422 diameter arrow.  No more adding tons of weight up front to break those stiff spines down like the old days.  We offer 80, 100, and 120 grain 3D points and 100 and 150 grain "Paper Puncher" points.  So if you're going after the X on paper or the bonus point on 3D, we have you covered.