Adams Golf Speedline Fast 10 Driver The new Speedline Fast 10 driver was developed with our patent pending , aerodynamic shaping and uses the most advanced science available to golf club designers today. Toe curvature increased 100%. Heal curvature reduced 300%. This produces 10% less drag and faster ball speed. MOI (moment of intertia) increased 10%, face area increased 17%, stable airflow and expanded sweet spot allows for 10% more forgiveness. Faster club head speed and faster ball speed with the new Speedline Fast 10 equals 5 yards more distance.