A proven winner on the PGA Tour, RIFLE features a discrete constant taper per inch for each shaft in the set resulting in more energy transfer to the ball. The ball gets up faster and flattens out for a penetrating trajectory. Project X shafts incorporate Stepless Design Technology where each individual shaft throughout the set is comprised of a specific taper length. This unique design feature optimizes the flex distribution and energy transfer without sacrificing control. Stepless Design technology provides tip stiffness for stronger players, producing greater accuracy with a smooth yet solid feel at impact and optimum trajectory and spin control.