It is absolutely true that the head of the club is responsible for hitting the ball but the outcome of the shot is decided by both the head as well as the shaft. The above statement is correct for both the iron shafts as well as the graphite ones. Weight of the shaft plays a significant role in both the vibe of the club and the execution of it. Heavier the shaft, lower will be the flight of the ball and vice versa. The difference in the kick points and bend points gives different results.