The Aerotech SteelFIber Parallel provides you with the best of both worlds: Get the power of graphite shafts with the stability of steel shafts. At the core of the SteelFiber shaft is filament-wound carbon fiber. The filament winding process yields a seamless and incredibly uniform bending golf shaft. The high strength-to-weight ratio of carbon fiber delivers the desired stiffness and strength properties at lighter weights than steel, and the lightweight properties of graphite increase club head speed and promote greater distance. You can purchase the Aerotech SteelFiber Parallel in the following models: i70, i80, i95, i110, and i125.